fix(engine): a callable Proxy as toPrimitive, valueOf, a typed-array callback or a decorator no longer crashes, and deep Proxy/bound-function chains throw RangeError

[frostney]

Summary

Two crash classes around callable Proxies and bound functions.

#1462: a callable Proxy where a built-in calls a user callable. Several call sites checked IsCallable, which a Proxy whose target is a function passes, and then hard-cast the value to TGocciaFunctionBase. The production build stopped with Fatal error: Access violation, and the development build with Invalid type cast. A class as valueOf or Symbol.toPrimitive hit the same casts. Every such site now dispatches through the generic [[Call]] (DispatchCall / InvokeCallable, which route a callable Proxy through its apply trap). Function objects keep the direct call.

#1497: deep chains in production builds. Chains that alternate Proxies with bound functions, and classes that each extend a Proxy of the previous class, ran native recursion with no bound, and the production build ran into the guard page (exit 139). They now end in a catchable RangeError: Maximum call stack size exceeded, as Node.js does for the class chain, and the engine keeps working afterwards:

• A chain of bound functions is collapsed in a loop for [[Call]] and [[Construct]] (CollapseBoundFunctionChain). This applies in TGocciaBoundFunctionValue.Call and its fast paths, in the VM's ConstructValue and InvokeConstructableWithReceiver, and in the interpreter's two construct paths. So a pure bound chain completes at any depth: 20,000 levels construct, where new crashed at 15,000 in bytecode before.
• A Proxy's [[Call]] forward to a bound function, its [[Construct]] forward to a bound function or a class, and instanceof through a bound function (each step reads the next target's @@hasInstance, so it cannot be collapsed) now count against MAX_PROPERTY_DELEGATION_DEPTH, like a forward to a Proxy target already does (fix(runtime): throw RangeError instead of crashing when deeply nested Proxies forward any internal method #1432).
• EnterPropertyDelegation and EnterObjectDelegation also check the native stack reserve (NATIVE_STACK_RESERVE, as fix(vm): count constructor, async, generator and accessor calls against --max-stack in bytecode, and stop them before the native stack runs out #1482 does for VM re-entries) once more than NATIVE_REENTRY_UNCHECKED_DEPTH (8) delegations nest. The count alone did not hold when native re-entries already filled most of the stack, or when a level was expensive, such as a trap wrapped in bound functions. Programs whose delegations do not nest never look the stack bounds up.
• IsConstructable and GetFunctionRealm step through bound functions and Proxies in a loop instead of recursing. typeof and IsCallable still stop at the first bound function, so calls through a chain stay O(1) per level.

Closes #1462
Closes #1497
Part of #825

Call sites changed (#1462 audit)

Every TGocciaFunctionBase(...) cast in source/units and source/app was checked. These sites took a guest callable without a TGocciaFunctionBase check, and now dispatch generically:

Site	What reaches it
Goccia.Values.ToPrimitive.pas: ToPrimitiveGeneric, TryCallMethod	Symbol.toPrimitive, valueOf, toString in every conversion
Goccia.Values.TypedArrayValue.pas: InvokeCallback	every %TypedArray%.prototype callback method
Goccia.Values.ClassValue.pas: TGocciaInstanceValue.GetPropertyWithContext, AssignProperty	an accessor whose get/set is a Proxy on an array, a class instance, or a class prototype reached through an instance (the setter path now also checks IsCallable)
Goccia.Values.ClassValue.pas: RunMethodInitializers, RunFieldInitializers, RunDecoratorFieldInitializers, static decorator field initializers	addInitializer callbacks, and field initializers a decorator returns
Goccia.Values.ClassValue.pas: private getter/setter storage, now TGocciaValue	a private accessor a decorator replaces
Goccia.VM.pas: ApplyClassDecorator, ApplyElementDecorator, decorated private getter/setter, FinishDecorators class and static initializers, static private accessor get/set, compiled private accessor registration	decorators and their results, bytecode
Goccia.VM.DispatchCase.inc: OP_USING_DISPOSE (new DispatchCallNoArgs)	Symbol.dispose, bytecode
Goccia.Evaluator.pas: six decorator calls, private getter/setter decorator results (cast to TGocciaFunctionValue), class/static initializers, eight private accessor reads and writes	the same, interpreter
Goccia.Test262.Host.pas: $262.agent.receiveBroadcast	the broadcast callback
Goccia.Builtins.TestingLibrary.pas: RunCallbacks, and RegisterHook / onTestFinished registration, which now accept any callable	hook and onTestFinished callbacks

Audited and left as they are. Each of these is guarded by is TGocciaFunctionBase with a generic fallback, rejects non-functions with a TypeError, or only sees engine-created functions:

• ArrayValue callbacks (12), Map/Set forEach, Utils.InvokeCallable, ProxyValue trap and target dispatch
• FunctionBase call/apply/bound fast paths, MockFunction (rejects non-functions when enqueued)
• TestingLibrary test/describe registration and Benchmark registration, GocciaTestRunner/GocciaWasmTestRunner runTests
• the engine's dynamic-function result, the REPL formatter, and the VM's closure realm lookups

Spec

ECMA-262 es2026, tc39-mcp 0.6.5 snapshot 0248456c758431e4bb8e5d26333ff1865123c9cd:

• §7.1.1 ToPrimitive (sec-toprimitive), steps 1.a (? GetMethod(input, %Symbol.toPrimitive%)) and 1.b.iv (? Call(exoticToPrim, input, « hint »))
• §7.1.1.1 OrdinaryToPrimitive (sec-ordinarytoprimitive), step 3.b.i
• §7.3.10 GetMethod (sec-getmethod), step 3: only IsCallable is required
• §10.1.8.1 OrdinaryGet step 7, and §10.1.9.2 OrdinarySetWithOwnDescriptor step 6: call the getter/setter
• §10.4.1.1 / §10.4.1.2 bound function [[Call]] / [[Construct]] (sec-bound-function-exotic-objects-call-thisargument-argumentslist, …-construct-argumentslist-newtarget). Construct step 5: If SameValue(F, newTarget), set newTarget to target, applied at every collapsed level.
• §10.4.1.3 BoundFunctionCreate (sec-boundfunctioncreate), step 6: [[Construct]] only if the target is a constructor
• §10.5.12 / §10.5.13 Proxy [[Call]] / [[Construct]]: forward with Call/Construct when there is no trap
• §7.3.24 GetFunctionRealm (sec-getfunctionrealm), steps 2–3
• §7.3.21 OrdinaryHasInstance (sec-ordinaryhasinstance), step 2: InstanceofOperator(O, BC)

None of these bounds chain depth, so the engine iterates where the result cannot be observed (bound chains) and otherwise throws the RangeError it uses for every other depth limit.

Behavior

Production build (./build.pas --prod runner), Linux x86-64, 3 GB cgroup cap.

Script	main (135e513)	this branch	Node.js 24
+{ [Symbol.toPrimitive]: new Proxy(() => 1, {}) }	Access violation	1	1
#1462 matrix, 98 one-line scripts × 2 modes	69 Access violation	0	—
altcall.js from #1497 (15,000 alternating levels)	exit 139, both modes	call RangeError, new RangeError	call 1, new object
classext.js from #1497 (30,000 classes)	exit 139, both modes	new RangeError	new RangeError
new on 15,000 bound functions (bytecode)	exit 139	object	object
instanceof against 15,000 bound functions	exit 139	RangeError	RangeError
1,990 alternating levels inside a 2,150-deep getter recursion (bytecode)	exit 139	RangeError	—

Expected values for the new tests come from Node.js 24.21.0, where Node implements the feature (decorators excepted). Node rejects a Proxy as Symbol.dispose; that is a V8 bug (GetDisposeMethod uses GetMethod).

Tests

New files, each red on main and green here (dev build, both modes):

• tests/language/expressions/to-primitive-proxy.js: 12 tests. main fails all 12, both modes.
• tests/built-ins/TypedArray/prototype/callable-proxy-callback.js: 7 tests. main fails 6, both modes.
• tests/language/explicit-resource-management/callable-proxy-dispose.js: 4 tests. main fails all 4 in bytecode; the interpreter already passed. The fourth, a Proxy that a [Symbol.dispose] getter returns and whose apply getter collects, faults the GC-stress build (./build.pas --gc-stress, exit 70) without the rooting DispatchCall now gives a callable Proxy for its whole [[Call]].
• tests/built-ins/Goccia/callable-proxy-hooks.js: 6 tests. A callable Proxy as beforeAll, beforeEach, afterEach, afterAll and onTestFinished; a Proxy of a plain object is still rejected.
• tests/language/decorators/callable-proxy.js: 12 tests. main fails 11, both modes.
• tests/language/classes/callable-proxy-accessors.js: 5 tests. main fails 2, both modes.
• tests/built-ins/Proxy/bound-function-chains.js: 12 tests. On main the file segfaults, both modes. It covers bound chains to 20,000 levels, alternating chains and class-extends-Proxy chains at 500/300 levels (values match Node) and past the bound at 3,000 and 20,000 levels (GocciaScript only), new.target, bound-argument order and this.

scripts/depth-probe.ts gains five probes: bind-chain-construct, bind-chain-instanceof, proxy-bind-alternating-call, proxy-bind-alternating-construct and class-extends-proxy-chain. Their chains hide name, so memory stays linear in the depth.

Verification

• ./build.pas --clean (dev), then ./build/GocciaTestRunner -P tests --jobs=6 and --mode=interpreted: 14,864/14,864 passed in each mode, on the merged head. The production build also passes 14,864/14,864 in each mode.

• Pascal unit tests: all 105 build/*.Test binaries pass.

• CLI scripts: test-cli-assertions, test-cli, -lexer, -parser, -config, -apps, -permissions, -embedded-resources, -intl-taint, -ffi-callback-slots and test-cli-differential all pass. test-cli-differential reports 0 divergent files.

• ./format.pas --check, check-trunc-guards, and the markdown/doc checks pass.

• test262: the full pinned corpus (2e0a5676, 52,530 tests) with GocciaTest262Runner --mode=bytecode --jobs=6, production builds of main and this branch. 0 PASS→FAIL. 4 TIMEOUT→PASS from host load. built-ins/Proxy passes 311/311 and built-ins/Function/prototype/bind 100/100 on both. These directories were rerun on the final head (after the merge and the interpreter follow-up), with the same baseline, and show 0 PASS→FAIL and 0 changes: built-ins/Proxy (311/311), built-ins/Function (509/509), Reflect, TypedArray, TypedArrayConstructors, Symbol, DisposableStack and Object, plus language/expressions/class, language/statements/class, instanceof, new, super and using — 15,471 tests in all.

• scripts/depth-probe.ts, full catalog, production builds of main and this branch: the only changed outcomes are class-extends-proxy-chain at 30,000, which goes from crash to RangeError in both modes. The new probes at 30,000 deep, on main → this branch:

  • proxy-bind-alternating-call and proxy-bind-alternating-construct: crash → RangeError
  • bind-chain-instanceof: crash → RangeError
  • bind-chain-construct: crash → object

• Performance: callgrind on a fixed workload over the changed paths (production builds) went from 673,447,411 to 665,006,664 instructions (−1.3%). The workload covers bound calls with 0–2 arguments and a bound-of-bound, class construction with fields and a private getter, ToPrimitive through toString/valueOf/@@toPrimitive, a read through 12 nested Proxies, and a typed-array map. Function objects keep their direct-call fast paths everywhere.

• Review follow-up (head 8be61d5a, merged with main at 0b6d5057): ./build.pas --clean testrunner, then ./build/GocciaTestRunner -P tests and --mode=interpreted: 14,890/14,890 passed in each mode; ./format.pas --check passes. test262 on the full pinned corpus (52,530 tests), dev builds of the pre-fix merge f1ee9caa and 8be61d5a, --jobs=12 --timeout=20s: 0 PASS→FAIL. The two PASS→TIMEOUT results (staging/sm/Proxy/ownkeys-linear.js and staging/sm/TypedArray/element-setting-converts-using-ToNumber.js) also time out on the baseline when run alone at 20s, and both pass on both builds at 90s.

Not changed

These pre-existing problems turned up while testing. Each reproduces on main, and none is a crash fixed or caused here:

• Bytecode: a decorator's replacement for a private method, getter or setter is ignored, plain functions included; the interpreter installs it. The new decorator test only asserts that reading and writing such an accessor does not crash.
• Bytecode: let C = class {}; for (const _ of [1]) C = class extends C {}; inside a function, followed by new C() from a nested arrow, throws C is not a constructor.
• Bytecode: a chain of 30,000 plain derived classes (no Proxies) still segfaults the production build, through InvokeImplicitSuperInitializationRegisters. The depth-probe class-extends-chain row shows it on main too.
• Interpreter: recursion through getters is not counted, so it can still overflow the native stack. This is documented in docs/embedding.md, and the interpreter is being removed (Remove the tree-walk interpreter #825).

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ℹ️ Recent review info

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• Configuration used: Repository TS config (base), Central YAML (inherited), Organization UI (inherited)
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📥 Commits

Reviewing files that changed from the base of the PR and between a071700 and c4f006e.

📒 Files selected for processing: 11

• docs/embedding.md
• source/units/Goccia.Builtins.TestingLibrary.pas
• source/units/Goccia.Evaluator.pas
• source/units/Goccia.StackLimit.pas
• source/units/Goccia.Test262.Host.pas
• source/units/Goccia.VM.pas
• source/units/Goccia.Values.ClassValue.pas
• source/units/Goccia.Values.FunctionBase.pas
• source/units/Goccia.Values.ProxyValue.pas
• source/units/Goccia.Values.ToPrimitive.pas
• source/units/Goccia.Values.TypedArrayValue.pas

🚧 Files skipped from review as they are similar to previous changes: 1

• docs/embedding.md

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📝 Walkthrough

The change adds shared dispatch for callable values, including callable Proxies, across runtime invocation paths. It also collapses bound-function chains iteratively and adds native stack checks for deep delegation. New tests and depth probes cover these paths.

Changes: Callable Dispatch and Delegation

Layer / File(s)	Summary
Bound chains and delegation limits source/units/Goccia.Values.FunctionBase.pas, source/units/Goccia.Values.ProxyValue.pas, source/units/Goccia.StackLimit.pas, source/units/Goccia.Evaluator.pas, source/units/Goccia.VM.pas, scripts/depth-probe.ts, tests/built-ins/Proxy/bound-function-chains.js, docs/embedding.md	Bound-function chains are collapsed iteratively for calls and construction. Proxy traversal and delegation checks cover additional deep chains. Tests and probes cover bound chains, alternating Proxy/bound-function chains, and Proxy-based class inheritance. Documentation describes the delegation checks and chain handling.
Decorator and private-accessor dispatch source/units/Goccia.Evaluator.pas, source/units/Goccia.VM.pas, source/units/Goccia.Values.ClassValue.pas, tests/language/decorators/callable-proxy.js, tests/language/classes/callable-proxy-accessors.js	Decorator callbacks and initializers use shared dispatch. Private getter and setter storage accepts TGocciaValue, and accessor calls handle callable values. Tests cover callable Proxy decorators, initializers, getters, and setters.
Other callable invocation paths source/units/Goccia.Values.ToPrimitive.pas, source/units/Goccia.Values.TypedArrayValue.pas, source/units/Goccia.VM.DispatchCase.inc, source/units/Goccia.Builtins.TestingLibrary.pas, source/units/Goccia.Test262.Host.pas, tests/language/expressions/to-primitive-proxy.js, tests/built-ins/TypedArray/prototype/callable-proxy-callback.js, tests/language/explicit-resource-management/callable-proxy-dispose.js, tests/built-ins/Goccia/callable-proxy-hooks.js, tests/built-ins/Proxy/callable-proxy-receiver-gc-roots.js	Primitive-conversion methods, TypedArray callbacks, disposal methods, test callbacks, and broadcast callbacks use shared callable dispatch. Tests cover callback values and arguments, Proxy apply traps, receiver handling, and propagated exceptions.

Priority: ➖ Normal

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to c4f00

Callable Proxy hooks, disposal methods, and private accessors have the required dispatch and rooting paths. No actionable merge-blocking risk remains after normal checks.

Security architecture risk: 🔵 Low · up to c4f00

The change replaces crash-prone callback handling with guarded invocation and bounds deep delegation. No introduced security weakness was verified, but the broad behavioral reach and unverified platform behavior leave low residual risk.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The relevant security scope is script-to-native execution within an embedding process: script-controlled callable values can trigger handler lookup and apply traps from implicit coercion, callbacks and disposal. A native crash would affect the hosting process rather than only the current script. Tenant layout, service isolation and production deployment exposure are not established by the supplied evidence.

Trust Boundaries and Controls

• observed — Inspected generic invocation rejects non-callable values, and Proxy application checks revocation and target callability before trap lookup. Decorator getter/setter results retain callable validation. Interpreter static-private access checks the private brand before invoking the widened accessor value; inspected VM static-private paths retain receiver-own lookup rather than introducing inherited accessor dispatch.

Resilience and Maintainability Implications

• observed — When native stack bounds cannot be discovered, the new delegation stack check does not enforce measured headroom; the existing property/object depth caps remain the fallback. This is a limitation of the containment guarantee, not a verified PR-introduced vulnerability.

Pre-merge checks: 5

Check name	Status	Explanation
Title check		The title clearly summarizes the two main changes: callable Proxy crash fixes and RangeError handling for deep Proxy/bound-function chains. It is long but specific and directly related to the changese…
Description check		The description includes the required Summary section, explains the implementation and constraints, documents verification results, and identifies non-goals and pre-existing issues.
Linked Issues check		The PR meets the coding requirements for #1462 and #1497. For #1462, the reported changes replace unsafe function-base casts with generic callable dispatch for conversions, typed-array callbacks, acce…
Out of Scope Changes check		The changed source, tests, documentation, and depth probes support #1462 or #1497. Generic dispatch and rooting changes support callable Proxy handling in #1462. Iterative bound traversal, delegation …
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 9…

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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[github-actions]

Web Tooling Benchmark

Workload	Status	Goccia
acorn	pass	0.05 runs/s
babel	pass	0.02 runs/s
babel-minify	pass	0.27 runs/s
babylon	pass	0.09 runs/s
buble	pass	0.19 runs/s
chai	pass	0.25 runs/s
coffeescript	pass	0.01 runs/s
espree	pass	0.04 runs/s
esprima	pass	0.10 runs/s
jshint	pass	0.02 runs/s
lebab	pass	0.16 runs/s
postcss	pass	0.04 runs/s
prepack	pass	0.20 runs/s
prettier	pass	0.13 runs/s
source-map	pass	0.07 runs/s
terser	pass	0.63 runs/s
typescript	pass	0.30 runs/s
uglify-js	pass	0.12 runs/s

_{18 pinned Web Tooling workloads; 18 workloads produced at least one Goccia sample. Raw results from 1 sample per workload; full stdout/stderr for failures and min/max/CV stay in the web-tooling-report artifact. This lane is Goccia-only by design.}

[github-actions]

test262 Conformance

10 timeout(s) — counted separately from ordinary conformance failures; inspect the full artifact for affected tests.

Category	Run	Passed	Δ Pass	Failed	Timeouts	Δ Timeout	Wrap-Infra	Pass-rate	Δ Rate
built-ins	23,823	23,534	±0	289	0	±0	0	98.8%	±0pp
harness	116	116	±0	0	0	±0	0	100.0%	±0pp
intl402	3,382	3,360	±0	21	1	±0	0	99.3%	±0pp
language	23,726	21,655	±0	2,071	0	±0	0	91.3%	±0pp
staging	1,483	1,398	±0	76	9	±0	0	94.3%	±0pp
total	52,530	50,063	±0	2,457	10	±0	0	95.3%	±0pp

Areas closest to 100%

Area	Pass rate	Δ vs main	Passing
intl402/Temporal	100.0%	±0pp	2,028 / 2,029
built-ins/Promise	99.7%	±0pp	730 / 732
built-ins/TypedArray	99.7%	±0pp	1,449 / 1,453

Per-test deltas (+0 / -0 / timeout +1 / -1)

New timeouts (1):

• staging/sm/regress/regress-610026.js

Resolved timeouts (1):

• staging/sm/extensions/recursion.js

_{Steady-state failures and timeouts are non-blocking; PASS → non-timeout failure transitions fail the conformance gate. Measured on ubuntu-latest x64, bytecode mode. Areas grouped by the first two test262 path components; minimum 25 attempted tests, areas already at 100% excluded. Δ vs main compares against the most recent cached main baseline.}

[github-actions]

JetStream 3 Performance Barometer

Workload	Status	Goccia main	Goccia PR	QuickJS	Node.js	vs QuickJS	vs Node.js
hash-map	pass	1.19	1.20	13.53	337.13	11.31×	281.84×
ai-astar	pass	5.58	5.54	70.21	521.24	12.66×	94.00×
gaussian-blur	pass	0.52	0.52	8.03	285.39	15.50×	550.86×
raytrace-public-class-fields	pass	1.93	1.95	21.52	345.75	11.02×	177.10×
sync-fs	pass	1.78	1.72	26.53	223.96	15.42×	130.15×
lazy-collections	pass	4.92	4.99	67.97	151.78	13.62×	30.42×

Geomean reference ratio: QuickJS 13.14×; Node.js 147.34×.

_{1.00× means aligned; values above 1.00× mean Goccia was proportionally slower after normalizing JetStream’s higher-is-better score. This is a directional barometer across runtimes with different goals, not a product ranking. Raw samples and failure details remain in the jetstream-report artifact.}

[github-actions]

AWFY Results

Target	Status	Goccia main	Goccia PR	QuickJS 2026-06-04	NodeJS v26.12.0	Δ PR vs main
Bounce	pass	9.27ms	9.46ms	1.04ms	1.08ms	🔴 -2.01%
CD	pass	94.24ms	93.37ms	10.72ms	9.37ms	~ overlap (+0.92%)
DeltaBlue	pass	2.01ms	1.98ms	309.94µs	1.85ms	~ overlap (+1.47%)
Havlak	pass	33.00s	32.45s	4157.65ms	182.12ms	~ overlap (+1.67%)
Json	pass	125.28ms	125.29ms	14.56ms	4.52ms	~ overlap (-0.01%)
List	pass	5.89ms	5.89ms	1.04ms	0.68ms	~ overlap (+0.01%)
Mandelbrot	pass	23.27µs	25.68µs	4.84µs	93.29µs	🔴 -10.33%
NBody	pass	208.91µs	236.39µs	28.11µs	400.23µs	~ overlap (-13.15%)
Permute	pass	12.12ms	11.85ms	1.86ms	0.72ms	~ overlap (+2.23%)
Queens	pass	6.68ms	6.53ms	1.26ms	1.04ms	🟢 +2.29%
Richards	pass	297.82ms	300.53ms	51.83ms	6.46ms	~ overlap (-0.91%)
Sieve	pass	5.23ms	5.31ms	0.55ms	477.01µs	🔴 -1.56%
Storage	pass	19.47ms	19.61ms	2.97ms	0.98ms	~ overlap (-0.73%)
Towers	pass	17.78ms	17.58ms	3.20ms	1.13ms	~ overlap (+1.13%)

Geomean Ratios

Ratio (row / column)	Goccia main	Goccia PR	QuickJS 2026-06-04	NodeJS v26.12.0
Goccia main	1.000	0.988	6.836	8.419
Goccia PR	1.013	1.000	6.922	8.525
QuickJS 2026-06-04	0.146	0.144	1.000	1.232
NodeJS v26.12.0	0.119	0.117	0.812	1.000

_{14 pinned AWFY benchmarks. Medians from 5 interleaved samples per engine; raw JSON includes min/max/CV and is attached as the awfy-report artifact. Δ compares PR Goccia median against the same-runner main Goccia median; overlapping min/max ranges are treated as unchanged noise. Rows below 0.5ms are timer-floor sensitive.}

[github-actions]

Suite Timing

Test Runner (interpreted: 14,956 passed; bytecode: 14,956 passed)

Metric	Interpreted	Bytecode
Total	14956	14956
Passed	14956 ✅	14956 ✅
Workers	4	4
Test Duration	12.43s	13.13s
Lex (cumulative)	2.28s	2.02s
Parse (cumulative)	1.19s	1.09s
Compile (cumulative)	—	1.09s
Execute (cumulative)	660.5ms	14.02s
Engine Total (cumulative)	4.13s	18.22s
Lex (avg/worker)	571.2ms	505.9ms
Parse (avg/worker)	296.7ms	273.1ms
Compile (avg/worker)	—	272.5ms
Execute (avg/worker)	165.1ms	3.50s
Engine Total (avg/worker)	1.03s	4.56s

Memory

GC rows aggregate the main thread plus all worker thread-local GCs. Test runner worker shutdown frees thread-local heaps in bulk; that shutdown reclamation is not counted as GC collections or collected objects.

Metric	Interpreted	Bytecode
GC Live	2.68 MiB	2.39 MiB
GC Peak Live	490.96 MiB	271.92 MiB
GC Allocated During Run	1.57 GiB	1.24 GiB
GC Limit	7.81 GiB	7.81 GiB
GC Collections	3,077	3,086
GC Collected Objects	10,756,471	7,427,222
Heap Start Allocated	475.9 KiB	475.9 KiB
Heap End Allocated	3.18 MiB	3.18 MiB
Heap Delta Allocated	2.71 MiB	2.71 MiB
Heap Delta Free	2.32 MiB	2.32 MiB

Benchmarks (interpreted: 440; bytecode: 440)

Metric	Interpreted	Bytecode
Total	440	440
Workers	4	4
Duration	3.00min	3.03min

Memory

GC rows aggregate the main thread plus all worker thread-local GCs. Benchmark runner performs explicit between-file collections, so collection and collected-object counts can be much higher than the test runner.

Metric	Interpreted	Bytecode
GC Live	35.8 KiB	35.8 KiB
GC Peak Live	397.41 MiB	557.91 MiB
GC Allocated During Run	28.88 GiB	20.93 GiB
GC Limit	7.81 GiB	7.81 GiB
GC Collections	6,082	8,712
GC Collected Objects	300,195,080	282,344,247
Heap Start Allocated	1.18 MiB	1.18 MiB
Heap End Allocated	1.19 MiB	1.19 MiB
Heap Delta Allocated	3.2 KiB	3.2 KiB

Boot

Metric	Interpreted	Bytecode
Boot (median)	3.6ms	3.6ms
Boot (min)	3.4ms	3.5ms

Empty-script (0;) end-to-end process wall-clock for GocciaRunner, min and median over 60 runs after 10 warmups. Includes a fixed process / dynamic-loader floor that does not shrink, so it understates the engine-boot speedup; treat as practical boot time, not pure engine work.

_{Measured on ubuntu-latest x64.}

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Benchmark Results

440 benchmarks · PR vs same-runner main build

Interpreted: 🟢 49 improved · 🔴 45 regressed · 346 unchanged · avg +0.3%
Bytecode: 🟢 45 improved · 🔴 34 regressed · 361 unchanged · avg +1.4%

Typical per-run noise (median variance): interpreted ±1.5%, bytecode ±2.1%. Deltas within noise overlap and read as unchanged.

arraybuffer.js — Interp: 🟢 1, 13 unch. · avg +0.5% · Bytecode: 🟢 1, 13 unch. · avg +0.7%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
create ArrayBuffer(0)	117,890 ops/sec [115,225..135,150] → 116,509 ops/sec [115,107..117,269]	~ overlap (-1.2%)	204,734 ops/sec [155,559..207,492] → 207,850 ops/sec [205,955..212,919]	~ overlap (+1.5%)
create ArrayBuffer(64)	113,320 ops/sec [75,964..117,827] → 121,456 ops/sec [116,899..139,655]	~ overlap (+7.2%)	195,850 ops/sec [189,543..208,744] → 195,023 ops/sec [191,084..217,700]	~ overlap (-0.4%)
create ArrayBuffer(1024)	108,125 ops/sec [105,300..118,785] → 109,192 ops/sec [106,125..113,986]	~ overlap (+1.0%)	168,090 ops/sec [160,466..169,855] → 169,585 ops/sec [164,549..177,857]	~ overlap (+0.9%)
create ArrayBuffer(8192)	76,551 ops/sec [76,072..76,851] → 76,779 ops/sec [74,827..80,838]	~ overlap (+0.3%)	90,380 ops/sec [55,931..97,554] → 89,150 ops/sec [86,683..96,196]	~ overlap (-1.4%)
slice full buffer (64 bytes)	92,959 ops/sec [91,594..102,823] → 94,195 ops/sec [93,159..99,525]	~ overlap (+1.3%)	109,067 ops/sec [108,313..111,525] → 114,228 ops/sec [109,139..126,943]	~ overlap (+4.7%)
slice half buffer (512 of 1024 bytes)	87,729 ops/sec [86,976..106,703] → 89,317 ops/sec [89,128..90,167]	~ overlap (+1.8%)	102,292 ops/sec [101,104..104,149] → 102,677 ops/sec [101,071..105,200]	~ overlap (+0.4%)
slice with negative indices	83,780 ops/sec [81,071..91,795] → 84,631 ops/sec [80,939..94,607]	~ overlap (+1.0%)	102,178 ops/sec [85,075..103,358] → 104,239 ops/sec [103,856..104,438]	🟢 +2.0%
slice empty range	91,432 ops/sec [89,799..102,068] → 90,491 ops/sec [90,306..98,138]	~ overlap (-1.0%)	106,989 ops/sec [103,981..115,094] → 107,634 ops/sec [105,010..127,144]	~ overlap (+0.6%)
byteLength access	295,761 ops/sec [285,450..298,954] → 292,186 ops/sec [285,581..319,962]	~ overlap (-1.2%)	818,156 ops/sec [772,591..888,703] → 825,299 ops/sec [819,184..844,173]	~ overlap (+0.9%)
Symbol.toStringTag access	238,450 ops/sec [234,209..248,266] → 232,190 ops/sec [230,234..252,481]	~ overlap (-2.6%)	445,836 ops/sec [436,897..564,870] → 444,234 ops/sec [437,868..474,386]	~ overlap (-0.4%)
ArrayBuffer.isView	181,861 ops/sec [179,402..189,007] → 180,961 ops/sec [176,000..191,433]	~ overlap (-0.5%)	392,550 ops/sec [385,496..393,620] → 390,354 ops/sec [356,934..417,340]	~ overlap (-0.6%)
clone ArrayBuffer(64)	149,594 ops/sec [147,334..156,134] → 145,466 ops/sec [143,063..156,060]	~ overlap (-2.8%)	215,317 ops/sec [210,900..219,691] → 217,560 ops/sec [207,660..222,005]	~ overlap (+1.0%)
clone ArrayBuffer(1024)	137,230 ops/sec [134,550..139,429] → 139,360 ops/sec [138,393..140,115]	~ overlap (+1.6%)	180,929 ops/sec [179,912..181,514] → 182,938 ops/sec [179,643..184,823]	~ overlap (+1.1%)
clone ArrayBuffer inside object	90,096 ops/sec [87,542..91,137] → 92,609 ops/sec [91,361..102,880]	🟢 +2.8%	100,265 ops/sec [99,663..135,756] → 100,289 ops/sec [98,976..104,595]	~ overlap (+0.0%)

arrays.js — Interp: 🟢 2, 🔴 2, 15 unch. · avg -0.6% · Bytecode: 🟢 2, 17 unch. · avg +1.7%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
Array.from length 100	2,899 ops/sec [2,799..3,017] → 2,832 ops/sec [2,492..3,209]	~ overlap (-2.3%)	2,982 ops/sec [2,822..3,505] → 2,908 ops/sec [2,403..3,149]	~ overlap (-2.5%)
Array.from 10 elements	25,805 ops/sec [15,508..28,597] → 25,450 ops/sec [25,109..25,814]	~ overlap (-1.4%)	23,630 ops/sec [23,052..28,534] → 23,361 ops/sec [23,012..23,453]	~ overlap (-1.1%)
Array.of 10 elements	60,365 ops/sec [57,603..62,614] → 60,631 ops/sec [58,671..65,009]	~ overlap (+0.4%)	64,332 ops/sec [63,673..64,787] → 64,703 ops/sec [63,636..72,847]	~ overlap (+0.6%)
spread into new array	120,753 ops/sec [118,984..121,127] → 118,965 ops/sec [117,039..121,355]	~ overlap (-1.5%)	191,163 ops/sec [149,600..215,263] → 199,608 ops/sec [188,468..247,300]	~ overlap (+4.4%)
map over 50 elements	6,208 ops/sec [6,001..6,410] → 5,938 ops/sec [5,897..6,222]	~ overlap (-4.3%)	8,982 ops/sec [8,863..9,743] → 8,693 ops/sec [8,066..9,124]	~ overlap (-3.2%)
filter over 50 elements	6,636 ops/sec [6,608..6,644] → 6,466 ops/sec [6,415..6,501]	🔴 -2.5%	10,526 ops/sec [9,392..12,992] → 10,485 ops/sec [10,009..10,770]	~ overlap (-0.4%)
reduce sum 50 elements	8,165 ops/sec [8,120..8,560] → 7,925 ops/sec [7,639..8,052]	🔴 -2.9%	15,536 ops/sec [15,414..15,628] → 16,321 ops/sec [15,100..17,871]	~ overlap (+5.0%)
forEach over 50 elements	5,201 ops/sec [5,162..5,823] → 5,098 ops/sec [5,031..5,273]	~ overlap (-2.0%)	16,032 ops/sec [15,762..16,129] → 16,450 ops/sec [16,192..16,677]	🟢 +2.6%
find in 50 elements	11,259 ops/sec [11,186..11,360] → 11,500 ops/sec [11,421..11,509]	🟢 +2.1%	20,492 ops/sec [20,310..21,152] → 21,382 ops/sec [21,016..21,944]	~ overlap (+4.3%)
sort 20 elements	4,386 ops/sec [4,350..4,399] → 4,451 ops/sec [4,420..4,500]	🟢 +1.5%	6,661 ops/sec [6,586..6,737] → 7,433 ops/sec [6,677..8,709]	~ overlap (+11.6%)
flat nested array	36,721 ops/sec [36,449..37,463] → 36,505 ops/sec [36,110..36,828]	~ overlap (-0.6%)	37,346 ops/sec [35,916..37,598] → 37,851 ops/sec [36,726..38,900]	~ overlap (+1.4%)
flatMap	24,606 ops/sec [23,957..32,524] → 23,516 ops/sec [23,244..24,690]	~ overlap (-4.4%)	26,543 ops/sec [26,178..27,013] → 27,856 ops/sec [27,263..31,604]	🟢 +4.9%
map inside map (5x5)	7,176 ops/sec [7,014..7,718] → 7,184 ops/sec [7,157..7,199]	~ overlap (+0.1%)	9,017 ops/sec [8,656..9,189] → 8,906 ops/sec [8,565..9,138]	~ overlap (-1.2%)
filter inside map (5x10)	4,745 ops/sec [4,713..5,006] → 4,765 ops/sec [4,714..4,966]	~ overlap (+0.4%)	6,722 ops/sec [6,589..7,710] → 6,881 ops/sec [5,843..7,116]	~ overlap (+2.4%)
reduce inside map (5x10)	6,450 ops/sec [6,143..8,085] → 6,590 ops/sec [6,163..9,003]	~ overlap (+2.2%)	10,750 ops/sec [10,171..10,993] → 10,612 ops/sec [10,190..11,116]	~ overlap (-1.3%)
forEach inside forEach (5x10)	4,251 ops/sec [4,218..4,259] → 4,129 ops/sec [4,094..4,606]	~ overlap (-2.9%)	12,779 ops/sec [12,131..15,197] → 12,980 ops/sec [12,680..13,943]	~ overlap (+1.6%)
find inside some (10x10)	4,752 ops/sec [4,600..4,899] → 4,816 ops/sec [4,726..4,977]	~ overlap (+1.4%)	9,127 ops/sec [8,695..9,653] → 9,318 ops/sec [8,349..9,687]	~ overlap (+2.1%)
map+filter chain nested (5x20)	1,461 ops/sec [1,425..1,473] → 1,452 ops/sec [1,408..1,504]	~ overlap (-0.6%)	2,054 ops/sec [2,043..2,852] → 2,082 ops/sec [2,031..2,436]	~ overlap (+1.4%)
reduce flatten (10x5)	18,672 ops/sec [17,824..19,535] → 19,853 ops/sec [18,540..22,171]	~ overlap (+6.3%)	21,471 ops/sec [20,162..23,719] → 21,478 ops/sec [21,214..23,242]	~ overlap (+0.0%)

async-await.js — Interp: 🔴 1, 5 unch. · avg -1.3% · Bytecode: 6 unch. · avg -0.0%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
single await	43,317 ops/sec [40,431..46,885] → 41,949 ops/sec [34,829..46,029]	~ overlap (-3.2%)	54,371 ops/sec [47,294..55,461] → 54,636 ops/sec [53,011..55,284]	~ overlap (+0.5%)
multiple awaits	17,548 ops/sec [16,773..20,184] → 17,609 ops/sec [17,208..18,581]	~ overlap (+0.3%)	23,475 ops/sec [23,102..23,941] → 23,206 ops/sec [22,924..27,462]	~ overlap (-1.1%)
await non-Promise value	69,735 ops/sec [69,367..77,531] → 66,828 ops/sec [66,070..68,355]	🔴 -4.2%	116,317 ops/sec [115,635..119,208] → 115,974 ops/sec [114,418..119,223]	~ overlap (-0.3%)
await with try/catch	35,009 ops/sec [34,755..35,133] → 35,095 ops/sec [34,665..35,585]	~ overlap (+0.2%)	52,729 ops/sec [51,073..54,252] → 53,787 ops/sec [51,859..54,176]	~ overlap (+2.0%)
await Promise.all	8,350 ops/sec [8,103..9,222] → 8,161 ops/sec [8,030..8,661]	~ overlap (-2.3%)	7,573 ops/sec [7,297..7,631] → 7,483 ops/sec [7,314..7,724]	~ overlap (-1.2%)
nested async function call	24,140 ops/sec [23,792..24,679] → 24,366 ops/sec [24,055..24,558]	~ overlap (+0.9%)	37,016 ops/sec [36,908..37,052] → 37,039 ops/sec [36,826..38,908]	~ overlap (+0.1%)

async-generators.js — Interp: 🔴 1, 1 unch. · avg -5.4% · Bytecode: 2 unch. · avg -0.8%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
for-await-of over async generator	2,647 ops/sec [2,267..3,656] → 2,565 ops/sec [2,342..3,031]	~ overlap (-3.1%)	3,017 ops/sec [2,736..3,073] → 2,983 ops/sec [2,956..3,066]	~ overlap (-1.1%)
async generator with await in body	12,437 ops/sec [11,855..13,499] → 11,490 ops/sec [11,326..11,821]	🔴 -7.6%	13,520 ops/sec [13,337..14,211] → 13,454 ops/sec [13,363..13,523]	~ overlap (-0.5%)

atomics.js — Interp: 6 unch. · avg +1.0% · Bytecode: 6 unch. · avg +0.5%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
load and store Int32Array	93,080 ops/sec [92,182..96,340] → 96,212 ops/sec [94,139..98,088]	~ overlap (+3.4%)	170,946 ops/sec [162,493..173,705] → 173,831 ops/sec [171,516..175,844]	~ overlap (+1.7%)
read-modify-write Int32Array	69,864 ops/sec [67,308..77,539] → 70,237 ops/sec [69,240..70,442]	~ overlap (+0.5%)	115,392 ops/sec [102,635..117,722] → 120,072 ops/sec [115,797..121,317]	~ overlap (+4.1%)
compareExchange hit and miss	65,659 ops/sec [65,479..65,761] → 64,641 ops/sec [63,737..65,564]	~ overlap (-1.5%)	102,274 ops/sec [95,839..105,317] → 101,640 ops/sec [98,794..105,015]	~ overlap (-0.6%)
wait with zero timeout	151,436 ops/sec [150,198..159,215] → 155,313 ops/sec [153,056..158,930]	~ overlap (+2.6%)	266,173 ops/sec [264,997..272,040] → 266,006 ops/sec [263,586..266,562]	~ overlap (-0.1%)
waitAsync synchronous not-equal	120,376 ops/sec [119,842..122,858] → 121,702 ops/sec [120,366..126,523]	~ overlap (+1.1%)	167,826 ops/sec [163,502..169,368] → 167,541 ops/sec [166,712..173,423]	~ overlap (-0.2%)
notify with no waiters	154,626 ops/sec [152,538..155,530] → 154,516 ops/sec [154,147..155,630]	~ overlap (-0.1%)	271,226 ops/sec [267,223..278,067] → 265,938 ops/sec [263,111..268,889]	~ overlap (-1.9%)

base64.js — Interp: 🟢 5, 5 unch. · avg +3.2% · Bytecode: 10 unch. · avg +0.6%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
short ASCII (13 chars)	3,473 ops/sec [3,440..3,510] → 3,458 ops/sec [3,437..3,692]	~ overlap (-0.4%)	4,891 ops/sec [4,870..4,975] → 5,153 ops/sec [3,608..5,181]	~ overlap (+5.4%)
medium ASCII (450 chars)	127 ops/sec [123..131] → 133 ops/sec [127..159]	~ overlap (+4.2%)	194 ops/sec [183..196] → 197 ops/sec [189..219]	~ overlap (+1.5%)
Latin-1 characters	4,810 ops/sec [4,753..4,908] → 4,985 ops/sec [4,914..5,256]	🟢 +3.6%	6,863 ops/sec [6,806..6,899] → 7,197 ops/sec [6,784..7,426]	~ overlap (+4.9%)
short base64 (20 chars)	2,170 ops/sec [2,116..2,220] → 2,252 ops/sec [2,235..2,276]	🟢 +3.8%	5,197 ops/sec [4,976..6,099] → 5,058 ops/sec [5,016..5,068]	~ overlap (-2.7%)
medium base64 (600 chars)	83 ops/sec [82..86] → 86 ops/sec [86..87]	~ overlap (+3.9%)	201 ops/sec [196..205] → 203 ops/sec [195..218]	~ overlap (+1.2%)
Latin-1 output	3,065 ops/sec [2,993..3,150] → 3,219 ops/sec [3,210..3,407]	🟢 +5.0%	7,130 ops/sec [6,973..8,472] → 7,071 ops/sec [6,792..7,270]	~ overlap (-0.8%)
forgiving (no padding)	4,520 ops/sec [4,439..4,589] → 4,745 ops/sec [4,643..4,783]	🟢 +5.0%	9,770 ops/sec [9,547..11,911] → 9,579 ops/sec [9,431..10,160]	~ overlap (-2.0%)
with whitespace	2,161 ops/sec [2,096..2,197] → 2,261 ops/sec [2,242..2,279]	🟢 +4.6%	4,940 ops/sec [4,863..5,045] → 4,965 ops/sec [4,781..5,087]	~ overlap (+0.5%)
atob(btoa(short))	1,297 ops/sec [1,274..1,373] → 1,340 ops/sec [1,314..1,349]	~ overlap (+3.3%)	2,498 ops/sec [2,441..2,763] → 2,459 ops/sec [2,428..2,526]	~ overlap (-1.6%)
atob(btoa(medium))	50 ops/sec [49..57] → 50 ops/sec [49..52]	~ overlap (-1.5%)	99 ops/sec [97..100] → 98 ops/sec [96..102]	~ overlap (-0.7%)

classes.js — Interp: 🟢 6, 🔴 3, 22 unch. · avg +1.3% · Bytecode: 🟢 2, 🔴 2, 27 unch. · avg -0.3%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
simple class new	44,215 ops/sec [44,149..44,423] → 46,370 ops/sec [43,739..51,221]	~ overlap (+4.9%)	84,969 ops/sec [84,387..86,274] → 82,424 ops/sec [79,816..101,571]	~ overlap (-3.0%)
class with defaults	34,552 ops/sec [34,055..35,877] → 34,940 ops/sec [34,793..37,089]	~ overlap (+1.1%)	59,635 ops/sec [57,516..62,780] → 57,538 ops/sec [56,081..63,008]	~ overlap (-3.5%)
50 instances via Array.from	1,436 ops/sec [1,423..1,440] → 1,441 ops/sec [1,435..1,445]	~ overlap (+0.3%)	2,368 ops/sec [2,346..2,479] → 2,426 ops/sec [2,392..2,430]	~ overlap (+2.5%)
instance method call	20,280 ops/sec [20,182..21,339] → 20,853 ops/sec [20,672..22,587]	~ overlap (+2.8%)	50,657 ops/sec [49,779..51,501] → 51,442 ops/sec [50,083..51,958]	~ overlap (+1.6%)
static method call	35,918 ops/sec [35,573..36,337] → 36,008 ops/sec [35,780..37,399]	~ overlap (+0.2%)	94,854 ops/sec [93,592..95,848] → 95,683 ops/sec [94,025..101,132]	~ overlap (+0.9%)
single-level inheritance	18,218 ops/sec [16,681..20,130] → 17,428 ops/sec [16,813..17,765]	~ overlap (-4.3%)	33,367 ops/sec [32,426..35,185] → 31,066 ops/sec [29,395..31,936]	🔴 -6.9%
two-level inheritance	15,443 ops/sec [14,973..15,543] → 14,771 ops/sec [14,760..14,810]	🔴 -4.4%	28,326 ops/sec [26,450..28,810] → 25,735 ops/sec [24,457..30,154]	~ overlap (-9.1%)
private field access	23,927 ops/sec [23,396..24,566] → 22,888 ops/sec [22,161..23,204]	🔴 -4.3%	36,522 ops/sec [35,903..36,921] → 35,176 ops/sec [34,877..35,561]	🔴 -3.7%
private methods	26,192 ops/sec [25,876..26,561] → 26,225 ops/sec [25,926..26,499]	~ overlap (+0.1%)	37,668 ops/sec [37,214..37,778] → 35,986 ops/sec [35,687..40,064]	~ overlap (-4.5%)
getter/setter access	24,063 ops/sec [23,909..24,163] → 24,171 ops/sec [24,039..24,237]	~ overlap (+0.5%)	49,108 ops/sec [47,944..51,083] → 46,912 ops/sec [45,845..50,742]	~ overlap (-4.5%)
class decorator (identity)	36,307 ops/sec [34,081..36,997] → 36,329 ops/sec [35,330..38,618]	~ overlap (+0.1%)	48,365 ops/sec [47,818..57,910] → 49,910 ops/sec [44,816..57,276]	~ overlap (+3.2%)
class decorator (wrapping)	20,706 ops/sec [20,317..26,162] → 20,490 ops/sec [20,165..20,919]	~ overlap (-1.0%)	28,710 ops/sec [27,372..39,775] → 29,845 ops/sec [28,006..33,328]	~ overlap (+4.0%)
identity method decorator	26,757 ops/sec [26,504..27,015] → 27,412 ops/sec [24,106..34,131]	~ overlap (+2.4%)	39,388 ops/sec [37,967..48,643] → 43,679 ops/sec [37,999..47,403]	~ overlap (+10.9%)
wrapping method decorator	21,230 ops/sec [20,978..21,429] → 22,853 ops/sec [21,612..24,466]	🟢 +7.6%	33,667 ops/sec [32,837..37,953] → 32,975 ops/sec [32,637..33,890]	~ overlap (-2.1%)
stacked method decorators (x3)	16,985 ops/sec [16,699..17,496] → 16,036 ops/sec [15,607..17,421]	~ overlap (-5.6%)	19,550 ops/sec [18,706..22,360] → 20,089 ops/sec [19,661..22,118]	~ overlap (+2.8%)
identity field decorator	30,808 ops/sec [30,674..32,312] → 33,151 ops/sec [30,825..38,421]	~ overlap (+7.6%)	35,640 ops/sec [35,080..36,930] → 37,810 ops/sec [34,840..48,863]	~ overlap (+6.1%)
field initializer decorator	27,417 ops/sec [26,584..30,383] → 28,979 ops/sec [25,489..29,311]	~ overlap (+5.7%)	31,036 ops/sec [30,486..33,887] → 31,745 ops/sec [30,800..32,250]	~ overlap (+2.3%)
getter decorator (identity)	24,299 ops/sec [24,032..26,316] → 25,151 ops/sec [25,034..25,516]	~ overlap (+3.5%)	25,683 ops/sec [25,338..26,306] → 27,174 ops/sec [26,716..30,960]	🟢 +5.8%
setter decorator (identity)	20,299 ops/sec [20,135..20,409] → 21,339 ops/sec [21,182..21,470]	🟢 +5.1%	22,722 ops/sec [22,409..23,085] → 23,038 ops/sec [22,312..25,981]	~ overlap (+1.4%)
static method decorator	29,231 ops/sec [28,835..31,411] → 30,677 ops/sec [29,827..31,016]	~ overlap (+4.9%)	41,536 ops/sec [40,640..42,414] → 40,865 ops/sec [39,826..41,329]	~ overlap (-1.6%)
static field decorator	35,247 ops/sec [34,701..35,996] → 35,435 ops/sec [35,388..37,294]	~ overlap (+0.5%)	42,037 ops/sec [41,746..42,893] → 42,441 ops/sec [40,814..43,169]	~ overlap (+1.0%)
private method decorator	20,680 ops/sec [20,434..20,940] → 19,944 ops/sec [19,860..20,340]	🔴 -3.6%	31,201 ops/sec [30,780..31,747] → 30,633 ops/sec [29,634..33,126]	~ overlap (-1.8%)
private field decorator	23,258 ops/sec [22,846..23,993] → 24,713 ops/sec [24,118..24,982]	🟢 +6.3%	27,648 ops/sec [26,841..28,172] → 26,995 ops/sec [26,716..27,138]	~ overlap (-2.4%)
plain auto-accessor (no decorator)	28,193 ops/sec [27,214..28,868] → 27,548 ops/sec [27,058..27,827]	~ overlap (-2.3%)	34,211 ops/sec [33,461..35,517] → 36,347 ops/sec [35,530..38,334]	🟢 +6.2%
auto-accessor with decorator	19,071 ops/sec [18,673..19,968] → 19,420 ops/sec [18,916..19,811]	~ overlap (+1.8%)	21,043 ops/sec [19,947..24,139] → 21,163 ops/sec [20,704..22,707]	~ overlap (+0.6%)
decorator writing metadata	19,347 ops/sec [19,108..19,613] → 19,363 ops/sec [19,045..20,383]	~ overlap (+0.1%)	26,079 ops/sec [25,949..26,426] → 26,108 ops/sec [23,815..27,819]	~ overlap (+0.1%)
static getter read	39,307 ops/sec [37,894..39,696] → 40,852 ops/sec [40,044..42,867]	🟢 +3.9%	94,506 ops/sec [83,464..109,534] → 89,730 ops/sec [82,207..105,946]	~ overlap (-5.1%)
static getter/setter pair	30,374 ops/sec [30,077..30,735] → 30,146 ops/sec [29,366..30,519]	~ overlap (-0.7%)	55,605 ops/sec [53,933..56,477] → 54,851 ops/sec [54,526..63,674]	~ overlap (-1.4%)
inherited static getter	24,626 ops/sec [24,277..25,113] → 25,383 ops/sec [25,121..25,484]	🟢 +3.1%	46,417 ops/sec [40,947..47,862] → 44,884 ops/sec [44,429..48,454]	~ overlap (-3.3%)
inherited static setter	28,274 ops/sec [27,033..29,505] → 27,768 ops/sec [27,114..27,912]	~ overlap (-1.8%)	44,111 ops/sec [41,383..66,844] → 42,023 ops/sec [41,825..54,159]	~ overlap (-4.7%)
inherited static getter with this binding	20,054 ops/sec [19,850..20,652] → 21,058 ops/sec [20,899..21,287]	🟢 +5.0%	35,792 ops/sec [35,372..36,559] → 35,592 ops/sec [34,341..39,318]	~ overlap (-0.6%)

closures.js — Interp: 11 unch. · avg +1.6% · Bytecode: 11 unch. · avg -0.6%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
closure over single variable	31,493 ops/sec [30,372..34,620] → 31,435 ops/sec [30,457..31,513]	~ overlap (-0.2%)	230,320 ops/sec [222,983..269,314] → 222,771 ops/sec [217,121..227,610]	~ overlap (-3.3%)
closure over multiple variables	38,660 ops/sec [37,828..40,364] → 39,631 ops/sec [38,977..41,104]	~ overlap (+2.5%)	202,420 ops/sec [201,721..221,804] → 202,931 ops/sec [189,638..212,523]	~ overlap (+0.3%)
nested closures	44,860 ops/sec [41,369..47,906] → 43,584 ops/sec [42,186..44,107]	~ overlap (-2.8%)	186,445 ops/sec [183,020..287,991] → 190,814 ops/sec [180,593..193,281]	~ overlap (+2.3%)
function as argument	29,145 ops/sec [28,541..29,738] → 31,087 ops/sec [28,964..36,224]	~ overlap (+6.7%)	226,429 ops/sec [223,855..248,715] → 235,488 ops/sec [232,406..254,089]	~ overlap (+4.0%)
function returning function	37,337 ops/sec [36,243..40,553] → 38,103 ops/sec [37,355..39,284]	~ overlap (+2.1%)	232,375 ops/sec [225,334..234,925] → 232,596 ops/sec [217,555..236,651]	~ overlap (+0.1%)
compose two functions	23,730 ops/sec [23,250..24,369] → 24,787 ops/sec [23,656..27,406]	~ overlap (+4.5%)	146,616 ops/sec [142,019..150,214] → 146,805 ops/sec [138,297..165,357]	~ overlap (+0.1%)
fn.call	47,395 ops/sec [46,163..48,508] → 48,189 ops/sec [47,695..50,135]	~ overlap (+1.7%)	179,707 ops/sec [175,082..193,021] → 177,175 ops/sec [173,050..208,856]	~ overlap (-1.4%)
fn.apply	43,905 ops/sec [42,821..47,472] → 44,330 ops/sec [43,413..44,889]	~ overlap (+1.0%)	151,407 ops/sec [149,051..170,306] → 151,053 ops/sec [149,155..229,916]	~ overlap (-0.2%)
fn.bind	44,923 ops/sec [43,687..45,447] → 43,379 ops/sec [42,719..44,996]	~ overlap (-3.4%)	168,273 ops/sec [163,726..198,972] → 166,914 ops/sec [166,299..188,247]	~ overlap (-0.8%)
recursive sum to 50	3,905 ops/sec [3,715..4,195] → 3,930 ops/sec [3,827..4,229]	~ overlap (+0.7%)	112,186 ops/sec [108,568..124,909] → 110,350 ops/sec [110,021..110,480]	~ overlap (-1.6%)
recursive tree traversal	5,850 ops/sec [5,782..7,397] → 6,124 ops/sec [6,014..6,158]	~ overlap (+4.7%)	26,025 ops/sec [24,350..33,643] → 24,466 ops/sec [24,269..24,608]	~ overlap (-6.0%)

collections.js — Interp: 🟢 2, 10 unch. · avg +1.0% · Bytecode: 🔴 1, 11 unch. · avg -1.8%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
add 50 elements	3,809 ops/sec [3,782..3,823] → 3,813 ops/sec [3,771..3,840]	~ overlap (+0.1%)	7,712 ops/sec [7,471..10,767] → 8,097 ops/sec [7,920..10,073]	~ overlap (+5.0%)
has lookup (50 elements)	60,687 ops/sec [60,336..60,905] → 59,467 ops/sec [58,786..65,335]	~ overlap (-2.0%)	175,320 ops/sec [173,848..198,521] → 166,500 ops/sec [159,524..169,256]	🔴 -5.0%
delete elements	19,291 ops/sec [18,897..19,391] → 20,416 ops/sec [19,425..22,911]	🟢 +5.8%	22,522 ops/sec [21,206..29,829] → 22,142 ops/sec [21,071..26,454]	~ overlap (-1.7%)
forEach iteration	4,520 ops/sec [4,454..5,200] → 4,462 ops/sec [4,241..4,777]	~ overlap (-1.3%)	10,853 ops/sec [10,742..12,595] → 10,824 ops/sec [10,455..10,906]	~ overlap (-0.3%)
spread to array	23,969 ops/sec [23,159..27,755] → 23,997 ops/sec [23,659..26,719]	~ overlap (+0.1%)	135,579 ops/sec [128,932..207,345] → 125,059 ops/sec [122,005..129,985]	~ overlap (-7.8%)
deduplicate array	17,034 ops/sec [16,911..17,119] → 17,501 ops/sec [17,040..19,821]	~ overlap (+2.7%)	20,885 ops/sec [20,386..25,669] → 20,252 ops/sec [19,434..21,090]	~ overlap (-3.0%)
set 50 entries	2,925 ops/sec [2,919..2,983] → 2,916 ops/sec [2,903..3,087]	~ overlap (-0.3%)	5,675 ops/sec [5,175..7,897] → 5,543 ops/sec [5,201..5,944]	~ overlap (-2.3%)
get lookup (50 entries)	58,107 ops/sec [56,853..59,268] → 58,379 ops/sec [57,806..73,650]	~ overlap (+0.5%)	221,179 ops/sec [199,881..290,336] → 205,611 ops/sec [204,392..335,535]	~ overlap (-7.0%)
has check	74,406 ops/sec [73,438..77,692] → 74,632 ops/sec [73,167..75,165]	~ overlap (+0.3%)	287,258 ops/sec [243,939..351,888] → 259,611 ops/sec [242,751..271,052]	~ overlap (-9.6%)
delete entries	17,252 ops/sec [16,436..19,584] → 17,418 ops/sec [16,406..19,117]	~ overlap (+1.0%)	18,986 ops/sec [18,826..19,648] → 19,778 ops/sec [19,041..24,534]	~ overlap (+4.2%)
forEach iteration	4,559 ops/sec [4,486..4,898] → 4,499 ops/sec [4,460..4,558]	~ overlap (-1.3%)	10,824 ops/sec [10,289..13,150] → 11,042 ops/sec [10,617..18,686]	~ overlap (+2.0%)
keys/values/entries	6,363 ops/sec [6,182..6,457] → 6,738 ops/sec [6,639..6,879]	🟢 +5.9%	19,872 ops/sec [19,473..25,205] → 20,639 ops/sec [20,336..21,565]	~ overlap (+3.9%)

csv.js — Interp: 🟢 2, 11 unch. · avg +1.2% · Bytecode: 13 unch. · avg -0.9%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
parse simple 3-column CSV	46,500 ops/sec [44,589..50,617] → 47,365 ops/sec [46,988..58,915]	~ overlap (+1.9%)	49,476 ops/sec [47,926..50,051] → 48,577 ops/sec [47,545..51,120]	~ overlap (-1.8%)
parse 10-row CSV	12,869 ops/sec [12,831..13,343] → 12,777 ops/sec [12,703..12,917]	~ overlap (-0.7%)	12,551 ops/sec [12,037..13,116] → 12,170 ops/sec [11,632..15,268]	~ overlap (-3.0%)
parse 100-row CSV	2,114 ops/sec [2,054..2,348] → 2,123 ops/sec [2,113..2,569]	~ overlap (+0.4%)	1,853 ops/sec [1,821..1,894] → 1,878 ops/sec [1,868..1,882]	~ overlap (+1.3%)
parse CSV with quoted fields	69,957 ops/sec [68,918..74,595] → 69,149 ops/sec [68,932..69,484]	~ overlap (-1.2%)	81,336 ops/sec [79,837..82,872] → 82,820 ops/sec [82,577..83,373]	~ overlap (+1.8%)
parse without headers (array of arrays)	6,401 ops/sec [6,316..6,430] → 6,428 ops/sec [6,392..7,131]	~ overlap (+0.4%)	6,074 ops/sec [5,736..7,388] → 5,955 ops/sec [5,893..6,393]	~ overlap (-2.0%)
parse with semicolon delimiter	9,975 ops/sec [9,763..10,505] → 10,072 ops/sec [9,530..10,362]	~ overlap (+1.0%)	9,121 ops/sec [8,747..9,611] → 8,997 ops/sec [8,889..10,011]	~ overlap (-1.4%)
stringify array of objects	47,857 ops/sec [47,572..48,329] → 48,888 ops/sec [48,795..48,940]	🟢 +2.2%	56,148 ops/sec [53,352..57,779] → 54,609 ops/sec [52,497..57,315]	~ overlap (-2.7%)
stringify array of arrays	18,188 ops/sec [17,836..18,473] → 19,468 ops/sec [18,881..23,448]	🟢 +7.0%	18,885 ops/sec [18,383..20,040] → 18,556 ops/sec [17,946..23,552]	~ overlap (-1.7%)
stringify with values needing escaping	25,425 ops/sec [25,286..26,920] → 28,093 ops/sec [25,763..31,069]	~ overlap (+10.5%)	27,201 ops/sec [26,680..28,310] → 26,204 ops/sec [25,149..28,323]	~ overlap (-3.7%)
reviver converts numbers	684 ops/sec [658..816] → 656 ops/sec [651..659]	~ overlap (-4.1%)	713 ops/sec [695..746] → 712 ops/sec [696..745]	~ overlap (-0.2%)
reviver filters empty to null	8,599 ops/sec [8,383..9,573] → 8,431 ops/sec [8,388..8,445]	~ overlap (-2.0%)	12,511 ops/sec [12,300..13,179] → 12,867 ops/sec [12,709..14,189]	~ overlap (+2.8%)
parse then stringify	7,981 ops/sec [7,905..8,129] → 7,901 ops/sec [7,846..8,113]	~ overlap (-1.0%)	7,495 ops/sec [7,289..7,591] → 7,396 ops/sec [7,203..10,514]	~ overlap (-1.3%)
stringify then parse	7,656 ops/sec [7,500..7,858] → 7,695 ops/sec [7,503..7,838]	~ overlap (+0.5%)	7,691 ops/sec [7,301..8,583] → 7,697 ops/sec [7,287..10,079]	~ overlap (+0.1%)

destructuring.js — Interp: 🟢 5, 🔴 3, 14 unch. · avg +0.6% · Bytecode: 🟢 1, 🔴 1, 20 unch. · avg +2.0%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
simple array destructuring	74,545 ops/sec [73,741..74,880] → 76,706 ops/sec [76,470..78,100]	🟢 +2.9%	145,935 ops/sec [139,622..160,327] → 148,422 ops/sec [141,353..185,367]	~ overlap (+1.7%)
with rest element	71,762 ops/sec [71,706..71,916] → 75,572 ops/sec [74,727..77,139]	🟢 +5.3%	108,268 ops/sec [107,101..130,343] → 107,567 ops/sec [106,836..119,115]	~ overlap (-0.6%)
with defaults	71,630 ops/sec [70,742..73,744] → 77,708 ops/sec [74,492..90,239]	🟢 +8.5%	193,418 ops/sec [192,641..196,698] → 189,854 ops/sec [187,682..191,334]	🔴 -1.8%
skip elements	92,026 ops/sec [91,477..92,736] → 92,627 ops/sec [91,162..93,576]	~ overlap (+0.7%)	148,617 ops/sec [148,479..149,364] → 150,580 ops/sec [136,184..165,923]	~ overlap (+1.3%)
nested array destructuring	39,018 ops/sec [37,214..41,201] → 39,586 ops/sec [39,327..39,669]	~ overlap (+1.5%)	54,672 ops/sec [51,427..55,902] → 54,448 ops/sec [54,189..54,491]	~ overlap (-0.4%)
swap variables	104,070 ops/sec [101,492..120,725] → 105,470 ops/sec [104,895..105,599]	~ overlap (+1.3%)	208,391 ops/sec [207,782..210,594] → 206,197 ops/sec [202,380..223,036]	~ overlap (-1.1%)
simple object destructuring	78,495 ops/sec [77,157..78,731] → 78,033 ops/sec [77,712..80,836]	~ overlap (-0.6%)	150,908 ops/sec [150,260..151,563] → 152,033 ops/sec [150,653..198,160]	~ overlap (+0.7%)
with defaults	85,918 ops/sec [84,057..109,885] → 82,060 ops/sec [81,674..82,933]	🔴 -4.5%	257,798 ops/sec [252,125..339,833] → 252,900 ops/sec [250,936..313,356]	~ overlap (-1.9%)
with renaming	87,809 ops/sec [86,229..105,364] → 91,975 ops/sec [88,534..93,774]	~ overlap (+4.7%)	203,521 ops/sec [179,201..204,759] → 181,376 ops/sec [174,206..182,038]	~ overlap (-10.9%)
nested object destructuring	61,203 ops/sec [59,963..63,418] → 54,731 ops/sec [54,398..56,210]	🔴 -10.6%	102,457 ops/sec [91,771..141,515] → 100,420 ops/sec [90,137..116,881]	~ overlap (-2.0%)
rest properties	43,516 ops/sec [43,433..43,614] → 44,230 ops/sec [43,579..44,799]	~ overlap (+1.6%)	57,602 ops/sec [54,658..59,725] → 57,267 ops/sec [55,645..75,151]	~ overlap (-0.6%)
object parameter	28,495 ops/sec [27,221..29,611] → 28,241 ops/sec [28,108..28,368]	~ overlap (-0.9%)	80,516 ops/sec [76,094..81,053] → 80,059 ops/sec [75,926..87,639]	~ overlap (-0.6%)
array parameter	39,197 ops/sec [38,396..39,734] → 37,997 ops/sec [37,961..38,144]	🔴 -3.1%	79,366 ops/sec [79,040..87,865] → 80,824 ops/sec [76,725..81,661]	~ overlap (+1.8%)
mixed destructuring in map	9,127 ops/sec [9,009..9,486] → 9,088 ops/sec [8,922..9,370]	~ overlap (-0.4%)	18,842 ops/sec [17,658..21,070] → 19,068 ops/sec [17,134..21,235]	~ overlap (+1.2%)
forEach with array destructuring	18,874 ops/sec [17,872..19,270] → 18,422 ops/sec [18,158..18,555]	~ overlap (-2.4%)	29,399 ops/sec [28,175..31,119] → 29,124 ops/sec [28,907..29,502]	~ overlap (-0.9%)
map with array destructuring	19,281 ops/sec [18,742..21,469] → 20,610 ops/sec [19,985..20,674]	~ overlap (+6.9%)	22,058 ops/sec [21,121..23,515] → 22,795 ops/sec [22,620..22,866]	~ overlap (+3.3%)
filter with array destructuring	20,950 ops/sec [20,157..21,119] → 21,903 ops/sec [21,745..22,025]	🟢 +4.5%	25,430 ops/sec [23,941..30,506] → 27,727 ops/sec [23,915..30,280]	~ overlap (+9.0%)
reduce with array destructuring	24,609 ops/sec [24,409..24,970] → 25,309 ops/sec [25,005..27,952]	🟢 +2.8%	29,498 ops/sec [28,861..33,250] → 28,747 ops/sec [28,062..30,083]	~ overlap (-2.5%)
map with object destructuring	21,238 ops/sec [21,017..21,303] → 21,122 ops/sec [20,727..21,169]	~ overlap (-0.5%)	32,095 ops/sec [31,855..32,262] → 33,562 ops/sec [30,917..35,908]	~ overlap (+4.6%)
map with nested destructuring	17,368 ops/sec [16,062..18,379] → 16,250 ops/sec [15,763..17,733]	~ overlap (-6.4%)	28,360 ops/sec [27,299..46,311] → 34,149 ops/sec [33,984..34,222]	~ overlap (+20.4%)
map with rest in destructuring	11,626 ops/sec [11,516..14,974] → 11,812 ops/sec [11,351..12,095]	~ overlap (+1.6%)	11,161 ops/sec [11,039..11,999] → 13,141 ops/sec [12,893..13,211]	🟢 +17.7%
map with defaults in destructuring	11,002 ops/sec [10,887..11,080] → 11,113 ops/sec [11,075..11,141]	~ overlap (+1.0%)	28,377 ops/sec [28,060..29,682] → 29,682 ops/sec [28,675..31,015]	~ overlap (+4.6%)

fibonacci.js — Interp: 🔴 1, 7 unch. · avg -0.9% · Bytecode: 🔴 2, 6 unch. · avg +0.9%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
recursive fib(15)	107 ops/sec [105..110] → 108 ops/sec [103..110]	~ overlap (+0.8%)	3,525 ops/sec [3,448..3,566] → 3,350 ops/sec [3,324..3,413]	🔴 -5.0%
recursive fib(20)	10 ops/sec [10..10] → 9 ops/sec [9..10]	~ overlap (-6.3%)	318 ops/sec [317..319] → 308 ops/sec [306..308]	🔴 -3.4%
recursive fib(15) typed	105 ops/sec [103..106] → 103 ops/sec [102..106]	~ overlap (-1.6%)	3,482 ops/sec [3,457..3,513] → 3,451 ops/sec [3,294..3,581]	~ overlap (-0.9%)
recursive fib(20) typed	10 ops/sec [10..10] → 9 ops/sec [9..10]	🔴 -5.5%	318 ops/sec [316..439] → 318 ops/sec [312..336]	~ overlap (+0.1%)
iterative fib(20) via reduce	5,968 ops/sec [5,824..6,260] → 6,120 ops/sec [5,857..7,653]	~ overlap (+2.5%)	10,198 ops/sec [10,051..10,275] → 11,047 ops/sec [10,023..14,934]	~ overlap (+8.3%)
iterator fib(20)	2,577 ops/sec [2,523..2,646] → 2,644 ops/sec [2,623..2,651]	~ overlap (+2.6%)	7,660 ops/sec [7,523..7,724] → 7,699 ops/sec [7,611..7,795]	~ overlap (+0.5%)
iterator fib(20) via Iterator.from + take	2,783 ops/sec [2,736..2,956] → 2,840 ops/sec [2,821..2,957]	~ overlap (+2.0%)	4,209 ops/sec [4,085..4,319] → 4,717 ops/sec [4,097..5,224]	~ overlap (+12.1%)
iterator fib(20) last value via reduce	2,435 ops/sec [2,384..2,460] → 2,392 ops/sec [2,207..2,536]	~ overlap (-1.7%)	3,428 ops/sec [3,364..3,493] → 3,285 ops/sec [3,192..3,602]	~ overlap (-4.2%)

float16array.js — Interp: 🟢 8, 🔴 3, 21 unch. · avg +1.1% · Bytecode: 🟢 1, 31 unch. · avg +0.9%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
new Float16Array(0)	127,280 ops/sec [126,676..127,353] → 129,918 ops/sec [127,446..132,314]	🟢 +2.1%	183,208 ops/sec [181,135..196,784] → 196,228 ops/sec [175,815..216,960]	~ overlap (+7.1%)
new Float16Array(100)	123,298 ops/sec [122,925..123,902] → 127,037 ops/sec [124,296..138,527]	🟢 +3.0%	167,547 ops/sec [164,092..172,600] → 168,040 ops/sec [160,561..199,845]	~ overlap (+0.3%)
new Float16Array(1000)	110,348 ops/sec [109,858..110,892] → 107,174 ops/sec [106,397..107,296]	🔴 -2.9%	139,801 ops/sec [138,422..196,049] → 136,790 ops/sec [133,842..157,115]	~ overlap (-2.2%)
Float16Array.from([...100])	2,606 ops/sec [2,565..2,634] → 2,698 ops/sec [2,520..2,859]	~ overlap (+3.5%)	2,362 ops/sec [2,041..2,931] → 2,125 ops/sec [1,990..2,141]	~ overlap (-10.0%)
Float16Array.of(1.5, 2.5, 3.5, 4.5, 5.5)	84,107 ops/sec [80,022..84,984] → 87,678 ops/sec [86,687..88,902]	🟢 +4.2%	94,699 ops/sec [91,328..97,466] → 93,839 ops/sec [92,108..94,628]	~ overlap (-0.9%)
new Float16Array(float64Array)	36,075 ops/sec [35,602..36,340] → 37,326 ops/sec [37,250..39,019]	🟢 +3.5%	40,168 ops/sec [39,346..41,363] → 41,973 ops/sec [40,444..48,676]	~ overlap (+4.5%)
sequential write 100 elements	1,317 ops/sec [1,309..1,331] → 1,404 ops/sec [1,400..1,411]	🟢 +6.6%	13,832 ops/sec [13,211..14,747] → 13,466 ops/sec [13,382..13,526]	~ overlap (-2.6%)
sequential read 100 elements	1,576 ops/sec [1,558..1,703] → 1,663 ops/sec [1,659..1,667]	~ overlap (+5.5%)	14,266 ops/sec [13,935..14,596] → 14,217 ops/sec [14,096..17,597]	~ overlap (-0.3%)
write special values (NaN, Inf, -0)	57,373 ops/sec [56,766..60,035] → 61,327 ops/sec [60,959..61,478]	🟢 +6.9%	545,580 ops/sec [537,961..661,945] → 590,453 ops/sec [549,355..633,144]	~ overlap (+8.2%)
Float16Array write	1,327 ops/sec [1,324..1,331] → 1,383 ops/sec [1,381..1,388]	🟢 +4.3%	13,337 ops/sec [13,154..14,285] → 14,496 ops/sec [13,584..15,532]	~ overlap (+8.7%)
Float32Array write	1,404 ops/sec [1,391..1,407] → 1,377 ops/sec [1,371..1,386]	🔴 -1.9%	13,194 ops/sec [12,307..13,353] → 13,720 ops/sec [13,547..13,885]	🟢 +4.0%
Float64Array write	1,392 ops/sec [1,372..1,398] → 1,394 ops/sec [1,387..1,399]	~ overlap (+0.1%)	13,454 ops/sec [13,153..15,036] → 13,656 ops/sec [13,472..13,831]	~ overlap (+1.5%)
Float16Array read	1,615 ops/sec [1,544..1,651] → 1,598 ops/sec [1,595..1,602]	~ overlap (-1.0%)	14,907 ops/sec [14,333..15,847] → 14,691 ops/sec [14,376..14,792]	~ overlap (-1.5%)
Float32Array read	1,598 ops/sec [1,523..1,747] → 1,603 ops/sec [1,580..1,627]	~ overlap (+0.3%)	14,063 ops/sec [13,938..14,712] → 14,780 ops/sec [14,600..17,237]	~ overlap (+5.1%)
Float64Array read	1,640 ops/sec [1,582..1,759] → 1,612 ops/sec [1,506..2,003]	~ overlap (-1.7%)	14,792 ops/sec [14,716..14,944] → 14,859 ops/sec [14,481..15,692]	~ overlap (+0.5%)
fill(1.5)	10,597 ops/sec [10,520..10,652] → 9,519 ops/sec [9,408..9,990]	🔴 -10.2%	9,579 ops/sec [9,494..9,621] → 9,880 ops/sec [9,607..10,263]	~ overlap (+3.1%)
slice()	85,934 ops/sec [83,874..101,016] → 85,918 ops/sec [80,118..86,496]	~ overlap (-0.0%)	94,822 ops/sec [94,048..97,885] → 90,465 ops/sec [87,646..97,241]	~ overlap (-4.6%)
map(x => x * 2)	2,456 ops/sec [2,439..2,525] → 2,400 ops/sec [2,233..2,566]	~ overlap (-2.3%)	3,099 ops/sec [3,034..3,137] → 3,047 ops/sec [2,932..3,057]	~ overlap (-1.7%)
filter(x => x > 25)	2,431 ops/sec [2,358..2,663] → 2,316 ops/sec [2,266..2,485]	~ overlap (-4.7%)	3,193 ops/sec [3,137..3,300] → 3,205 ops/sec [3,164..3,256]	~ overlap (+0.4%)
reduce (sum)	2,503 ops/sec [2,387..2,740] → 2,281 ops/sec [2,181..2,462]	~ overlap (-8.9%)	2,960 ops/sec [2,834..3,234] → 2,953 ops/sec [2,859..2,966]	~ overlap (-0.3%)
sort()	29,298 ops/sec [26,724..29,509] → 29,924 ops/sec [26,811..31,117]	~ overlap (+2.1%)	28,188 ops/sec [28,040..30,098] → 28,418 ops/sec [28,259..32,446]	~ overlap (+0.8%)
indexOf()	39,300 ops/sec [38,870..40,308] → 39,992 ops/sec [39,740..41,233]	~ overlap (+1.8%)	41,166 ops/sec [40,740..51,101] → 41,603 ops/sec [40,913..49,884]	~ overlap (+1.1%)
reverse()	40,521 ops/sec [40,144..41,468] → 44,782 ops/sec [44,458..45,181]	🟢 +10.5%	47,965 ops/sec [45,645..48,875] → 47,702 ops/sec [47,530..47,720]	~ overlap (-0.5%)
toReversed()	37,451 ops/sec [36,586..38,553] → 40,604 ops/sec [35,253..41,346]	~ overlap (+8.4%)	43,176 ops/sec [42,650..56,260] → 44,271 ops/sec [43,582..45,002]	~ overlap (+2.5%)
toSorted()	17,405 ops/sec [17,180..19,049] → 18,633 ops/sec [18,558..18,674]	~ overlap (+7.1%)	17,895 ops/sec [17,783..18,081] → 17,955 ops/sec [17,804..18,365]	~ overlap (+0.3%)
create view over existing buffer	141,278 ops/sec [140,148..143,740] → 137,155 ops/sec [135,032..141,765]	~ overlap (-2.9%)	215,705 ops/sec [208,277..221,579] → 219,141 ops/sec [212,753..231,005]	~ overlap (+1.6%)
subarray()	94,662 ops/sec [92,987..95,413] → 96,835 ops/sec [91,603..101,714]	~ overlap (+2.3%)	107,297 ops/sec [106,620..110,185] → 110,213 ops/sec [107,778..111,180]	~ overlap (+2.7%)
set() from array	105,342 ops/sec [104,242..111,766] → 102,769 ops/sec [102,332..110,209]	~ overlap (-2.4%)	152,047 ops/sec [147,057..153,430] → 155,778 ops/sec [147,596..176,425]	~ overlap (+2.5%)
for-of loop	2,158 ops/sec [2,075..2,321] → 2,154 ops/sec [2,132..2,158]	~ overlap (-0.2%)	12,699 ops/sec [12,617..13,148] → 12,512 ops/sec [12,377..19,736]	~ overlap (-1.5%)
spread into array	11,093 ops/sec [10,936..12,278] → 11,096 ops/sec [10,516..11,679]	~ overlap (+0.0%)	31,746 ops/sec [30,099..31,996] → 31,530 ops/sec [30,671..31,722]	~ overlap (-0.7%)
f16round(1.337)	185,543 ops/sec [180,626..186,141] → 188,178 ops/sec [183,896..189,249]	~ overlap (+1.4%)	364,365 ops/sec [353,274..374,981] → 360,193 ops/sec [353,871..399,883]	~ overlap (-1.1%)
f16round over 100 values	1,347 ops/sec [1,296..1,389] → 1,361 ops/sec [1,339..1,379]	~ overlap (+1.0%)	5,332 ops/sec [5,275..5,517] → 5,409 ops/sec [5,195..5,505]	~ overlap (+1.4%)

for-in/for-in.js — Interp: 🟢 1, 🔴 2 · avg +0.6% · Bytecode: 3 unch. · avg -5.5%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
for...in over 50 own keys	3,491 ops/sec [3,400..3,504] → 3,331 ops/sec [3,313..3,342]	🔴 -4.6%	4,809 ops/sec [4,446..5,459] → 4,545 ops/sec [4,459..5,185]	~ overlap (-5.5%)
for...in over an 8-level chain of 50 shared keys	2,151 ops/sec [2,136..2,154] → 2,120 ops/sec [2,109..2,129]	🔴 -1.4%	3,160 ops/sec [2,685..3,623] → 2,704 ops/sec [2,673..3,407]	~ overlap (-14.5%)
for...in over a 16-level chain of 100 shared keys	753 ops/sec [751..767] → 812 ops/sec [807..817]	🟢 +7.8%	926 ops/sec [902..1,199] → 957 ops/sec [907..985]	~ overlap (+3.3%)

for-of.js — Interp: 🟢 2, 5 unch. · avg +1.9% · Bytecode: 🔴 1, 6 unch. · avg +3.2%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
for...of with 10-element array	18,683 ops/sec [18,332..19,972] → 19,166 ops/sec [19,009..19,318]	~ overlap (+2.6%)	212,139 ops/sec [209,699..220,968] → 209,828 ops/sec [208,055..221,795]	~ overlap (-1.1%)
for...of with 100-element array	2,233 ops/sec [2,186..2,331] → 2,270 ops/sec [2,211..2,289]	~ overlap (+1.7%)	46,660 ops/sec [46,037..51,494] → 48,010 ops/sec [45,969..57,149]	~ overlap (+2.9%)
for...of with string (10 chars)	12,774 ops/sec [12,576..12,886] → 12,896 ops/sec [12,715..12,922]	~ overlap (+1.0%)	30,494 ops/sec [29,944..30,819] → 31,643 ops/sec [29,462..39,882]	~ overlap (+3.8%)
for...of with Set (10 elements)	19,122 ops/sec [18,888..19,503] → 19,445 ops/sec [19,368..19,644]	~ overlap (+1.7%)	227,004 ops/sec [224,013..310,004] → 224,494 ops/sec [220,429..227,880]	~ overlap (-1.1%)
for...of with Map entries (10 entries)	10,523 ops/sec [10,253..10,610] → 10,783 ops/sec [10,425..11,075]	~ overlap (+2.5%)	22,162 ops/sec [21,554..25,423] → 22,347 ops/sec [21,499..25,401]	~ overlap (+0.8%)
for...of with destructuring	11,238 ops/sec [10,955..11,351] → 11,482 ops/sec [11,381..11,561]	🟢 +2.2%	26,982 ops/sec [26,845..27,064] → 32,432 ops/sec [26,492..35,282]	~ overlap (+20.2%)
for-await-of with sync array	12,371 ops/sec [12,090..12,431] → 12,627 ops/sec [12,491..12,689]	🟢 +2.1%	11,932 ops/sec [11,882..14,533] → 11,544 ops/sec [11,340..11,592]	🔴 -3.2%

generators.js — Interp: 4 unch. · avg -0.5% · Bytecode: 🔴 2, 2 unch. · avg -5.5%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
manual next over object generator	945 ops/sec [899..1,004] → 915 ops/sec [906..945]	~ overlap (-3.2%)	2,146 ops/sec [2,111..2,252] → 2,266 ops/sec [2,182..2,388]	~ overlap (+5.6%)
for...of over object generator	1,475 ops/sec [1,443..1,606] → 1,472 ops/sec [1,444..1,496]	~ overlap (-0.2%)	3,132 ops/sec [3,048..3,614] → 2,868 ops/sec [2,839..2,896]	🔴 -8.4%
yield delegation	1,481 ops/sec [1,455..1,530] → 1,508 ops/sec [1,500..1,516]	~ overlap (+1.8%)	3,091 ops/sec [3,066..3,121] → 2,866 ops/sec [2,834..2,897]	🔴 -7.3%
class generator method	1,513 ops/sec [1,501..1,519] → 1,509 ops/sec [1,390..1,528]	~ overlap (-0.2%)	3,253 ops/sec [3,227..3,282] → 2,871 ops/sec [2,831..3,354]	~ overlap (-11.8%)

intl.js — Interp: 🔴 2, 4 unch. · avg -0.1% · Bytecode: 6 unch. · avg -3.1%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
format decimal	30,935 ops/sec [30,606..33,119] → 30,529 ops/sec [28,759..30,769]	~ overlap (-1.3%)	27,427 ops/sec [24,366..28,173] → 26,046 ops/sec [25,023..29,628]	~ overlap (-5.0%)
format currency	24,428 ops/sec [24,051..24,824] → 25,341 ops/sec [24,262..25,958]	~ overlap (+3.7%)	20,265 ops/sec [19,248..20,345] → 20,049 ops/sec [19,501..22,598]	~ overlap (-1.1%)
format UTC date	10,754 ops/sec [10,521..10,947] → 10,386 ops/sec [10,366..10,440]	🔴 -3.4%	42,566 ops/sec [41,060..43,922] → 42,301 ops/sec [41,311..51,043]	~ overlap (-0.6%)
formatRange UTC dates	3,455 ops/sec [3,381..3,681] → 3,440 ops/sec [3,403..3,461]	~ overlap (-0.4%)	5,328 ops/sec [5,252..5,349] → 5,334 ops/sec [5,188..5,366]	~ overlap (+0.1%)
compare numeric strings	105,594 ops/sec [105,240..106,002] → 103,047 ops/sec [102,664..104,553]	🔴 -2.4%	158,048 ops/sec [157,610..158,850] → 151,049 ops/sec [150,722..160,522]	~ overlap (-4.4%)
sort short string list	19,087 ops/sec [18,807..19,228] → 19,687 ops/sec [18,712..20,662]	~ overlap (+3.1%)	18,957 ops/sec [18,019..19,710] → 17,520 ops/sec [17,104..19,279]	~ overlap (-7.6%)

iterators.js — Interp: 🟢 1, 🔴 6, 35 unch. · avg -0.3% · Bytecode: 🟢 17, 25 unch. · avg +5.6%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
Iterator.from({next}).toArray() — 20 elements	3,860 ops/sec [3,776..3,952] → 3,805 ops/sec [3,741..4,038]	~ overlap (-1.4%)	6,914 ops/sec [6,690..7,005] → 6,846 ops/sec [6,714..6,959]	~ overlap (-1.0%)
Iterator.from({next}).toArray() — 50 elements	1,678 ops/sec [1,674..1,682] → 1,587 ops/sec [1,571..1,611]	🔴 -5.4%	2,912 ops/sec [2,891..2,950] → 2,832 ops/sec [2,817..2,930]	~ overlap (-2.8%)
spread pre-wrapped iterator — 20 elements	3,746 ops/sec [3,697..3,770] → 3,661 ops/sec [3,536..3,690]	🔴 -2.3%	7,944 ops/sec [7,812..7,968] → 7,802 ops/sec [7,509..8,018]	~ overlap (-1.8%)
Iterator.from({next}).forEach — 50 elements	1,204 ops/sec [1,169..1,213] → 1,180 ops/sec [1,113..1,188]	~ overlap (-1.9%)	2,085 ops/sec [2,071..2,161] → 2,129 ops/sec [2,084..2,136]	~ overlap (+2.1%)
Iterator.from({next}).reduce — 50 elements	1,283 ops/sec [1,262..1,292] → 1,270 ops/sec [1,248..1,276]	~ overlap (-1.0%)	2,003 ops/sec [2,000..2,011] → 2,089 ops/sec [2,049..2,114]	🟢 +4.3%
wrap array iterator	22,931 ops/sec [22,642..23,370] → 23,018 ops/sec [22,703..23,382]	~ overlap (+0.4%)	21,576 ops/sec [21,370..24,941] → 24,296 ops/sec [23,104..24,456]	~ overlap (+12.6%)
wrap plain {next()} object	2,788 ops/sec [2,762..2,801] → 2,698 ops/sec [2,581..2,908]	~ overlap (-3.2%)	4,821 ops/sec [4,712..5,014] → 5,094 ops/sec [5,070..5,119]	🟢 +5.7%
map + toArray (50 elements)	1,026 ops/sec [1,019..1,044] → 987 ops/sec [973..1,000]	🔴 -3.8%	1,295 ops/sec [1,286..1,297] → 1,472 ops/sec [1,455..1,489]	🟢 +13.7%
filter + toArray (50 elements)	1,063 ops/sec [1,034..1,075] → 1,076 ops/sec [1,066..1,364]	~ overlap (+1.2%)	1,447 ops/sec [1,439..1,468] → 1,616 ops/sec [1,610..1,637]	🟢 +11.7%
take(10) + toArray (50 element source)	5,659 ops/sec [5,545..5,691] → 5,683 ops/sec [5,580..6,328]	~ overlap (+0.4%)	7,369 ops/sec [7,315..8,411] → 7,682 ops/sec [7,611..8,828]	~ overlap (+4.2%)
drop(40) + toArray (50 element source)	1,439 ops/sec [1,419..1,453] → 1,396 ops/sec [1,377..1,442]	~ overlap (-3.0%)	2,214 ops/sec [2,185..2,244] → 2,313 ops/sec [2,257..2,631]	🟢 +4.5%
chained map + filter + take (100 element source)	1,648 ops/sec [1,623..2,062] → 1,569 ops/sec [1,567..1,594]	🔴 -4.8%	1,936 ops/sec [1,934..1,941] → 2,068 ops/sec [2,059..2,197]	🟢 +6.8%
some + every (50 elements)	693 ops/sec [688..695] → 676 ops/sec [665..682]	🔴 -2.3%	1,165 ops/sec [1,138..1,201] → 1,232 ops/sec [1,180..1,352]	~ overlap (+5.8%)
find (50 elements)	1,566 ops/sec [1,509..1,588] → 1,494 ops/sec [1,477..1,538]	~ overlap (-4.6%)	2,511 ops/sec [2,498..2,522] → 2,615 ops/sec [2,449..2,857]	~ overlap (+4.1%)
concat 2 arrays (10 + 10 elements)	10,042 ops/sec [9,647..10,138] → 10,468 ops/sec [9,434..12,142]	~ overlap (+4.2%)	8,731 ops/sec [8,391..9,157] → 8,955 ops/sec [8,680..10,109]	~ overlap (+2.6%)
concat 5 arrays (10 elements each)	4,412 ops/sec [4,296..4,444] → 4,265 ops/sec [4,003..4,482]	~ overlap (-3.3%)	3,794 ops/sec [3,773..3,810] → 3,825 ops/sec [3,734..4,364]	~ overlap (+0.8%)
concat 2 arrays (20 + 20 elements)	5,717 ops/sec [5,601..5,768] → 5,446 ops/sec [5,358..5,627]	~ overlap (-4.7%)	4,790 ops/sec [4,566..5,392] → 4,923 ops/sec [4,899..5,112]	~ overlap (+2.8%)
concat + filter + toArray (20 + 20 elements)	2,128 ops/sec [2,085..2,155] → 2,142 ops/sec [2,109..2,172]	~ overlap (+0.6%)	2,103 ops/sec [2,035..2,142] → 2,320 ops/sec [2,133..2,520]	~ overlap (+10.3%)
concat + map + take (20 + 20 elements, take 10)	5,305 ops/sec [5,156..5,835] → 5,288 ops/sec [5,078..5,466]	~ overlap (-0.3%)	5,050 ops/sec [5,029..5,143] → 5,310 ops/sec [5,257..5,360]	🟢 +5.1%
concat Sets (15 + 15 elements)	7,139 ops/sec [6,983..7,529] → 7,072 ops/sec [6,951..7,330]	~ overlap (-0.9%)	5,988 ops/sec [5,957..6,306] → 6,501 ops/sec [6,192..6,573]	~ overlap (+8.6%)
concat boxed strings (13 + 13 characters)	6,799 ops/sec [6,710..6,897] → 6,995 ops/sec [6,819..7,057]	~ overlap (+2.9%)	5,810 ops/sec [5,783..5,859] → 6,491 ops/sec [6,321..6,556]	🟢 +11.7%
zip 2 arrays (10 + 10 elements)	17,043 ops/sec [16,971..18,979] → 18,393 ops/sec [17,428..18,697]	~ overlap (+7.9%)	15,947 ops/sec [15,109..16,443] → 16,204 ops/sec [15,947..16,266]	~ overlap (+1.6%)
zip 3 arrays (10 elements each)	17,264 ops/sec [16,373..17,731] → 17,167 ops/sec [16,948..17,285]	~ overlap (-0.6%)	15,029 ops/sec [14,986..15,064] → 15,285 ops/sec [15,061..15,416]	~ overlap (+1.7%)
zip 2 arrays (20 + 20 elements)	10,654 ops/sec [10,474..11,335] → 10,574 ops/sec [10,377..10,696]	~ overlap (-0.8%)	9,227 ops/sec [9,097..9,371] → 9,368 ops/sec [9,274..11,759]	~ overlap (+1.5%)
zip 2 arrays (50 + 50 elements)	4,715 ops/sec [4,666..4,794] → 5,060 ops/sec [4,997..5,463]	🟢 +7.3%	3,983 ops/sec [3,957..3,986] → 4,343 ops/sec [4,109..5,279]	🟢 +9.0%
zip shortest mode (20 + 10 elements)	17,839 ops/sec [16,794..20,146] → 17,183 ops/sec [16,883..17,619]	~ overlap (-3.7%)	15,217 ops/sec [14,822..15,497] → 16,149 ops/sec [15,599..16,468]	🟢 +6.1%
zip longest mode (10 + 20 elements)	10,135 ops/sec [9,714..11,024] → 10,526 ops/sec [9,480..11,202]	~ overlap (+3.9%)	8,579 ops/sec [8,297..9,185] → 9,032 ops/sec [8,826..9,157]	~ overlap (+5.3%)
zip strict mode (20 + 20 elements)	9,901 ops/sec [9,556..10,272] → 9,984 ops/sec [9,605..12,345]	~ overlap (+0.8%)	9,000 ops/sec [8,448..9,027] → 9,211 ops/sec [9,166..10,570]	🟢 +2.3%
zip + map + toArray (20 + 20 elements)	3,112 ops/sec [3,030..3,411] → 3,119 ops/sec [2,927..3,250]	~ overlap (+0.2%)	2,923 ops/sec [2,761..3,207] → 3,117 ops/sec [3,035..3,144]	~ overlap (+6.6%)
zip + filter + toArray (20 + 20 elements)	3,292 ops/sec [3,245..3,519] → 3,273 ops/sec [3,207..3,400]	~ overlap (-0.6%)	3,157 ops/sec [3,138..3,247] → 3,342 ops/sec [3,239..3,393]	~ overlap (+5.9%)
zip Sets (15 + 15 elements)	13,382 ops/sec [12,760..13,618] → 13,480 ops/sec [12,985..14,139]	~ overlap (+0.7%)	11,189 ops/sec [11,113..13,845] → 12,269 ops/sec [11,902..12,378]	~ overlap (+9.7%)
zipKeyed 2 keys (10 elements each)	15,889 ops/sec [15,600..15,955] → 15,753 ops/sec [15,176..16,105]	~ overlap (-0.9%)	14,409 ops/sec [13,735..17,157] → 14,742 ops/sec [14,654..14,760]	~ overlap (+2.3%)
zipKeyed 3 keys (20 elements each)	8,302 ops/sec [8,227..8,374] → 8,450 ops/sec [8,077..9,611]	~ overlap (+1.8%)	6,982 ops/sec [6,897..7,141] → 7,365 ops/sec [7,138..7,397]	~ overlap (+5.5%)
zipKeyed longest mode (10 + 20 elements)	9,022 ops/sec [8,909..9,066] → 9,194 ops/sec [8,774..9,608]	~ overlap (+1.9%)	7,629 ops/sec [7,540..7,791] → 8,072 ops/sec [7,884..8,239]	🟢 +5.8%
zipKeyed strict mode (20 + 20 elements)	9,308 ops/sec [9,170..9,328] → 9,470 ops/sec [9,278..9,762]	~ overlap (+1.7%)	7,858 ops/sec [7,822..7,908] → 8,112 ops/sec [7,997..8,142]	🟢 +3.2%
zipKeyed + filter + map (20 elements)	2,676 ops/sec [2,629..2,708] → 2,777 ops/sec [2,611..3,732]	~ overlap (+3.7%)	2,790 ops/sec [2,782..3,130] → 3,065 ops/sec [3,038..3,078]	~ overlap (+9.9%)
array.values().map().filter().toArray()	1,088 ops/sec [1,078..1,145] → 1,091 ops/sec [1,078..1,110]	~ overlap (+0.2%)	1,088 ops/sec [1,077..1,092] → 1,150 ops/sec [1,144..1,157]	🟢 +5.7%
array.values().take(5).toArray()	21,182 ops/sec [21,057..21,304] → 20,535 ops/sec [19,601..21,053]	🔴 -3.1%	19,639 ops/sec [18,423..22,297] → 19,537 ops/sec [18,982..30,517]	~ overlap (-0.5%)
array.values().drop(45).toArray()	4,735 ops/sec [4,521..5,149] → 4,558 ops/sec [4,444..4,794]	~ overlap (-3.7%)	3,786 ops/sec [3,777..3,814] → 4,528 ops/sec [4,123..4,687]	🟢 +19.6%
map.entries() chained helpers	1,579 ops/sec [1,554..1,582] → 1,536 ops/sec [1,496..1,608]	~ overlap (-2.8%)	1,524 ops/sec [1,506..1,761] → 1,617 ops/sec [1,604..1,622]	~ overlap (+6.1%)
set.values() chained helpers	2,658 ops/sec [2,627..2,687] → 2,702 ops/sec [2,651..2,754]	~ overlap (+1.6%)	2,746 ops/sec [2,650..2,786] → 2,916 ops/sec [2,896..2,938]	🟢 +6.2%
string iterator map + toArray	2,707 ops/sec [2,690..2,746] → 2,789 ops/sec [2,724..2,871]	~ overlap (+3.0%)	2,694 ops/sec [2,638..2,776] → 2,943 ops/sec [2,850..3,209]	🟢 +9.3%

json.js — Interp: 🔴 3, 20 unch. · avg -1.5% · Bytecode: 🟢 1, 🔴 2, 20 unch. · avg +0.0%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
parse simple object	58,516 ops/sec [58,365..58,604] → 58,721 ops/sec [57,779..59,315]	~ overlap (+0.3%)	59,012 ops/sec [58,037..59,732] → 58,505 ops/sec [57,474..62,324]	~ overlap (-0.9%)
parse nested object	38,178 ops/sec [37,544..38,527] → 37,971 ops/sec [37,822..38,260]	~ overlap (-0.5%)	36,137 ops/sec [35,530..37,080] → 35,950 ops/sec [35,409..36,125]	~ overlap (-0.5%)
parse array of objects	21,569 ops/sec [21,401..22,082] → 19,934 ops/sec [19,582..22,191]	~ overlap (-7.6%)	19,255 ops/sec [19,159..19,346] → 19,153 ops/sec [18,672..19,404]	~ overlap (-0.5%)
parse large flat object	22,370 ops/sec [21,990..23,030] → 19,917 ops/sec [19,713..20,329]	🔴 -11.0%	19,560 ops/sec [19,454..20,042] → 19,480 ops/sec [19,285..25,957]	~ overlap (-0.4%)
parse mixed types	17,637 ops/sec [17,506..17,712] → 15,979 ops/sec [15,454..16,409]	🔴 -9.4%	15,921 ops/sec [15,577..16,500] → 15,978 ops/sec [15,826..16,148]	~ overlap (+0.4%)
stringify simple object	58,398 ops/sec [57,880..60,382] → 57,982 ops/sec [57,360..58,690]	~ overlap (-0.7%)	58,309 ops/sec [57,350..58,941] → 58,679 ops/sec [58,254..59,086]	~ overlap (+0.6%)
stringify nested object	33,074 ops/sec [32,107..36,907] → 32,514 ops/sec [29,985..34,140]	~ overlap (-1.7%)	31,094 ops/sec [30,799..32,386] → 31,472 ops/sec [31,365..31,722]	~ overlap (+1.2%)
stringify array of objects	13,500 ops/sec [13,049..14,096] → 13,494 ops/sec [12,900..14,085]	~ overlap (-0.0%)	11,766 ops/sec [11,644..12,018] → 12,004 ops/sec [11,794..12,212]	~ overlap (+2.0%)
stringify mixed types	28,426 ops/sec [28,183..33,174] → 28,247 ops/sec [28,033..28,710]	~ overlap (-0.6%)	25,830 ops/sec [25,502..27,471] → 26,454 ops/sec [26,227..26,522]	~ overlap (+2.4%)
reviver doubles numbers	10,034 ops/sec [9,831..10,257] → 10,545 ops/sec [10,148..10,615]	~ overlap (+5.1%)	13,384 ops/sec [13,129..13,527] → 13,720 ops/sec [13,375..13,832]	~ overlap (+2.5%)
reviver filters properties	11,561 ops/sec [11,392..13,723] → 11,493 ops/sec [10,899..12,305]	~ overlap (-0.6%)	15,275 ops/sec [15,108..15,466] → 15,314 ops/sec [15,207..15,795]	~ overlap (+0.3%)
reviver on nested object	12,722 ops/sec [11,961..15,024] → 12,323 ops/sec [12,210..12,474]	~ overlap (-3.1%)	16,187 ops/sec [16,146..16,247] → 15,460 ops/sec [15,156..15,926]	🔴 -4.5%
reviver on array	6,289 ops/sec [6,171..6,467] → 6,450 ops/sec [6,322..6,636]	~ overlap (+2.6%)	9,517 ops/sec [9,435..9,579] → 9,017 ops/sec [8,874..9,191]	🔴 -5.3%
replacer function doubles numbers	11,503 ops/sec [11,235..12,184] → 12,338 ops/sec [11,671..12,689]	~ overlap (+7.3%)	17,516 ops/sec [17,132..20,653] → 17,214 ops/sec [16,790..18,895]	~ overlap (-1.7%)
replacer function excludes properties	15,803 ops/sec [14,995..17,437] → 15,810 ops/sec [15,674..15,920]	~ overlap (+0.0%)	24,275 ops/sec [23,818..26,734] → 23,886 ops/sec [23,725..24,624]	~ overlap (-1.6%)
array replacer (allowlist)	46,934 ops/sec [46,229..53,106] → 45,568 ops/sec [45,121..45,703]	🔴 -2.9%	43,822 ops/sec [42,677..51,245] → 44,613 ops/sec [44,085..48,938]	~ overlap (+1.8%)
stringify with 2-space indent	34,278 ops/sec [33,769..35,380] → 34,443 ops/sec [33,948..35,741]	~ overlap (+0.5%)	32,790 ops/sec [31,792..33,264] → 31,846 ops/sec [31,318..32,267]	~ overlap (-2.9%)
stringify with tab indent	34,193 ops/sec [34,042..34,954] → 34,430 ops/sec [34,019..35,645]	~ overlap (+0.7%)	32,708 ops/sec [32,233..33,806] → 32,376 ops/sec [32,235..32,493]	~ overlap (-1.0%)
stringify deeply nested object with 2-space indent	4,523 ops/sec [4,330..4,734] → 4,410 ops/sec [4,347..5,060]	~ overlap (-2.5%)	3,912 ops/sec [3,808..4,110] → 3,941 ops/sec [3,914..4,068]	~ overlap (+0.7%)
stringify deeply nested array with 2-space indent	6,664 ops/sec [6,492..7,830] → 6,764 ops/sec [6,437..7,154]	~ overlap (+1.5%)	5,543 ops/sec [5,437..5,608] → 5,840 ops/sec [5,712..5,863]	🟢 +5.4%
stringify very deeply nested object with 2-space indent	787 ops/sec [780..907] → 785 ops/sec [742..848]	~ overlap (-0.3%)	646 ops/sec [642..648] → 650 ops/sec [646..651]	~ overlap (+0.7%)
parse then stringify	18,142 ops/sec [18,040..19,875] → 17,228 ops/sec [16,694..22,282]	~ overlap (-5.0%)	16,982 ops/sec [16,938..17,641] → 16,947 ops/sec [16,850..20,590]	~ overlap (-0.2%)
stringify then parse	11,238 ops/sec [10,473..12,926] → 10,483 ops/sec [10,340..10,933]	~ overlap (-6.7%)	9,432 ops/sec [9,353..9,467] → 9,571 ops/sec [9,328..10,069]	~ overlap (+1.5%)

jsx.jsx — Interp: 🟢 1, 🔴 2, 18 unch. · avg -0.7% · Bytecode: 🔴 4, 17 unch. · avg -1.0%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
simple element	93,057 ops/sec [91,322..93,390] → 92,906 ops/sec [91,840..93,424]	~ overlap (-0.2%)	164,491 ops/sec [161,573..166,294] → 162,219 ops/sec [159,482..163,724]	~ overlap (-1.4%)
self-closing element	96,831 ops/sec [95,901..97,328] → 99,530 ops/sec [97,475..101,051]	🟢 +2.8%	182,760 ops/sec [171,306..191,529] → 168,239 ops/sec [166,033..176,555]	~ overlap (-7.9%)
element with string attribute	85,506 ops/sec [85,111..86,337] → 84,474 ops/sec [83,559..87,801]	~ overlap (-1.2%)	129,869 ops/sec [128,095..131,868] → 130,695 ops/sec [128,609..131,987]	~ overlap (+0.6%)
element with multiple attributes	71,951 ops/sec [70,913..73,123] → 77,969 ops/sec [72,769..106,669]	~ overlap (+8.4%)	97,669 ops/sec [95,461..103,983] → 97,720 ops/sec [96,317..98,828]	~ overlap (+0.1%)
element with expression attribute	73,187 ops/sec [71,722..75,359] → 75,164 ops/sec [74,063..75,979]	~ overlap (+2.7%)	135,820 ops/sec [135,060..135,835] → 129,907 ops/sec [128,037..131,911]	🔴 -4.4%
text child	106,541 ops/sec [93,873..108,216] → 96,236 ops/sec [95,605..96,697]	~ overlap (-9.7%)	178,147 ops/sec [168,094..197,046] → 167,421 ops/sec [166,973..167,539]	🔴 -6.0%
expression child	85,614 ops/sec [82,298..102,163] → 86,849 ops/sec [82,251..90,704]	~ overlap (+1.4%)	169,436 ops/sec [166,112..174,156] → 166,252 ops/sec [166,029..166,456]	~ overlap (-1.9%)
mixed text and expression	75,837 ops/sec [75,434..81,032] → 78,057 ops/sec [76,334..78,602]	~ overlap (+2.9%)	165,678 ops/sec [164,578..166,192] → 161,731 ops/sec [160,631..163,226]	🔴 -2.4%
nested elements (3 levels)	39,365 ops/sec [38,222..45,600] → 39,363 ops/sec [39,165..40,096]	~ overlap (-0.0%)	65,715 ops/sec [63,643..69,359] → 62,726 ops/sec [61,049..74,181]	~ overlap (-4.5%)
sibling children	29,372 ops/sec [27,710..31,925] → 29,537 ops/sec [28,096..31,237]	~ overlap (+0.6%)	47,697 ops/sec [47,557..48,524] → 55,443 ops/sec [46,272..64,653]	~ overlap (+16.2%)
component element	71,095 ops/sec [66,981..82,440] → 69,810 ops/sec [69,159..70,197]	~ overlap (-1.8%)	118,569 ops/sec [117,711..138,261] → 129,702 ops/sec [117,896..150,645]	~ overlap (+9.4%)
component with children	45,383 ops/sec [44,654..45,474] → 44,550 ops/sec [44,070..47,668]	~ overlap (-1.8%)	86,896 ops/sec [73,128..88,456] → 76,304 ops/sec [70,986..80,324]	~ overlap (-12.2%)
dotted component	61,210 ops/sec [59,896..66,649] → 61,629 ops/sec [60,073..68,869]	~ overlap (+0.7%)	93,532 ops/sec [93,152..94,147] → 93,902 ops/sec [91,120..99,174]	~ overlap (+0.4%)
empty fragment	101,360 ops/sec [100,401..111,484] → 97,434 ops/sec [94,813..98,279]	🔴 -3.9%	175,071 ops/sec [166,679..181,108] → 173,455 ops/sec [172,069..175,973]	~ overlap (-0.9%)
fragment with children	30,757 ops/sec [30,453..30,959] → 28,639 ops/sec [28,408..28,763]	🔴 -6.9%	50,505 ops/sec [47,292..56,532] → 48,785 ops/sec [47,687..50,230]	~ overlap (-3.4%)
spread attributes	44,867 ops/sec [42,943..45,994] → 43,644 ops/sec [43,422..44,565]	~ overlap (-2.7%)	61,127 ops/sec [59,836..61,422] → 58,139 ops/sec [57,855..58,392]	🔴 -4.9%
spread with overrides	39,808 ops/sec [39,140..42,822] → 39,503 ops/sec [38,159..41,785]	~ overlap (-0.8%)	49,685 ops/sec [48,409..54,426] → 49,438 ops/sec [47,730..51,365]	~ overlap (-0.5%)
shorthand props	64,651 ops/sec [63,889..66,271] → 66,853 ops/sec [64,890..67,582]	~ overlap (+3.4%)	119,382 ops/sec [119,104..120,945] → 118,141 ops/sec [116,157..120,532]	~ overlap (-1.0%)
nav bar structure	15,192 ops/sec [15,134..15,295] → 15,042 ops/sec [14,833..15,848]	~ overlap (-1.0%)	22,413 ops/sec [22,064..22,590] → 22,077 ops/sec [21,962..23,367]	~ overlap (-1.5%)
card component tree	17,650 ops/sec [16,378..19,810] → 16,703 ops/sec [16,466..20,578]	~ overlap (-5.4%)	25,265 ops/sec [25,066..25,748] → 26,842 ops/sec [24,784..28,073]	~ overlap (+6.2%)
10 list items via Array.from	7,133 ops/sec [6,889..7,250] → 7,041 ops/sec [6,945..7,092]	~ overlap (-1.3%)	8,279 ops/sec [8,068..9,158] → 8,265 ops/sec [8,225..8,377]	~ overlap (-0.2%)

modules.js — Interp: 9 unch. · avg +1.4% · Bytecode: 🔴 1, 8 unch. · avg -0.8%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
call imported function	138,673 ops/sec [134,257..140,067] → 140,630 ops/sec [139,555..141,392]	~ overlap (+1.4%)	725,421 ops/sec [680,173..764,282] → 694,309 ops/sec [680,814..789,500]	~ overlap (-4.3%)
call two imported functions	77,607 ops/sec [77,148..78,508] → 74,764 ops/sec [74,362..77,220]	~ overlap (-3.7%)	526,496 ops/sec [521,354..541,537] → 519,881 ops/sec [507,046..564,179]	~ overlap (-1.3%)
read imported constant	322,063 ops/sec [318,944..335,452] → 324,312 ops/sec [314,686..344,383]	~ overlap (+0.7%)	948,382 ops/sec [948,210..949,189] → 925,915 ops/sec [818,835..1,083,504]	~ overlap (-2.4%)
read imported string	321,322 ops/sec [310,094..325,998] → 337,140 ops/sec [319,819..350,016]	~ overlap (+4.9%)	972,602 ops/sec [919,123..1,015,276] → 904,681 ops/sec [901,824..913,208]	🔴 -7.0%
read JSON string property	325,203 ops/sec [320,137..329,813] → 328,469 ops/sec [323,863..342,384]	~ overlap (+1.0%)	953,392 ops/sec [876,005..1,231,330] → 1,064,398 ops/sec [861,771..1,428,320]	~ overlap (+11.6%)
read JSON number property	313,056 ops/sec [310,700..323,260] → 326,355 ops/sec [321,912..332,472]	~ overlap (+4.2%)	1,002,024 ops/sec [841,653..1,297,527] → 920,657 ops/sec [855,082..1,045,384]	~ overlap (-8.1%)
read JSON boolean property	319,087 ops/sec [307,218..365,539] → 324,354 ops/sec [323,047..325,674]	~ overlap (+1.7%)	945,967 ops/sec [864,686..1,123,651] → 901,737 ops/sec [859,776..1,236,284]	~ overlap (-4.7%)
read JSON array property	324,108 ops/sec [320,437..337,179] → 327,118 ops/sec [326,174..328,209]	~ overlap (+0.9%)	888,218 ops/sec [885,201..1,041,713] → 964,477 ops/sec [957,689..968,255]	~ overlap (+8.6%)
read multiple JSON properties	151,106 ops/sec [148,202..167,969] → 152,859 ops/sec [150,995..154,164]	~ overlap (+1.2%)	689,656 ops/sec [626,245..764,376] → 693,478 ops/sec [673,527..694,309]	~ overlap (+0.6%)

numbers.js — Interp: 12 unch. · avg -0.7% · Bytecode: 🟢 1, 🔴 1, 10 unch. · avg +3.1%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
integer arithmetic	79,853 ops/sec [78,510..81,267] → 77,926 ops/sec [76,988..78,918]	~ overlap (-2.4%)	775,223 ops/sec [772,986..776,018] → 767,168 ops/sec [764,245..768,560]	🔴 -1.0%
floating point arithmetic	95,814 ops/sec [92,766..97,171] → 94,625 ops/sec [92,925..94,925]	~ overlap (-1.2%)	632,597 ops/sec [626,134..641,781] → 624,242 ops/sec [602,523..632,289]	~ overlap (-1.3%)
number coercion	18,964 ops/sec [18,530..19,104] → 19,159 ops/sec [18,986..19,957]	~ overlap (+1.0%)	21,708 ops/sec [21,053..22,195] → 21,877 ops/sec [20,638..31,765]	~ overlap (+0.8%)
toFixed	34,970 ops/sec [34,050..36,861] → 35,478 ops/sec [34,948..36,420]	~ overlap (+1.5%)	44,600 ops/sec [44,281..45,632] → 45,302 ops/sec [43,664..45,815]	~ overlap (+1.6%)
toString	60,805 ops/sec [59,787..65,372] → 63,347 ops/sec [60,553..64,285]	~ overlap (+4.2%)	105,973 ops/sec [105,874..106,050] → 107,369 ops/sec [105,185..117,852]	~ overlap (+1.3%)
toString non-integer (shortest round-trip)	16,178 ops/sec [16,093..17,751] → 16,151 ops/sec [15,856..17,772]	~ overlap (-0.2%)	35,468 ops/sec [34,439..37,404] → 42,118 ops/sec [38,910..47,919]	🟢 +18.7%
valueOf	80,486 ops/sec [79,604..83,508] → 83,050 ops/sec [78,700..84,806]	~ overlap (+3.2%)	168,955 ops/sec [168,214..169,669] → 190,792 ops/sec [165,266..228,110]	~ overlap (+12.9%)
toPrecision	35,000 ops/sec [31,384..42,937] → 31,725 ops/sec [31,147..31,887]	~ overlap (-9.4%)	39,576 ops/sec [39,337..39,841] → 40,407 ops/sec [39,799..43,772]	~ overlap (+2.1%)
Number.isNaN	75,208 ops/sec [74,767..75,871] → 72,909 ops/sec [71,908..82,520]	~ overlap (-3.1%)	177,484 ops/sec [175,169..183,680] → 182,150 ops/sec [181,291..183,013]	~ overlap (+2.6%)
Number.isFinite	75,905 ops/sec [73,800..82,239] → 74,227 ops/sec [70,659..90,376]	~ overlap (-2.2%)	168,635 ops/sec [167,003..169,691] → 170,148 ops/sec [166,333..172,835]	~ overlap (+0.9%)
Number.isInteger	76,212 ops/sec [75,877..78,481] → 75,755 ops/sec [74,578..79,274]	~ overlap (-0.6%)	179,849 ops/sec [169,631..209,718] → 168,800 ops/sec [163,244..170,090]	~ overlap (-6.1%)
Number.parseInt and parseFloat	24,874 ops/sec [24,422..28,512] → 25,052 ops/sec [24,287..26,236]	~ overlap (+0.7%)	29,929 ops/sec [25,700..32,118] → 31,343 ops/sec [30,952..31,514]	~ overlap (+4.7%)

objects.js — Interp: 🔴 1, 7 unch. · avg +0.1% · Bytecode: 🔴 2, 6 unch. · avg -1.5%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
create simple object	180,755 ops/sec [177,262..183,654] → 182,047 ops/sec [174,394..185,307]	~ overlap (+0.7%)	199,077 ops/sec [198,780..200,076] → 194,351 ops/sec [192,009..195,833]	🔴 -2.4%
create nested object	112,389 ops/sec [111,291..114,398] → 111,047 ops/sec [103,292..132,319]	~ overlap (-1.2%)	101,768 ops/sec [99,241..103,358] → 103,628 ops/sec [99,177..115,600]	~ overlap (+1.8%)
create 50 objects via Array.from	3,773 ops/sec [3,757..3,849] → 3,701 ops/sec [3,685..3,724]	🔴 -1.9%	3,428 ops/sec [3,341..3,447] → 3,296 ops/sec [3,241..4,437]	~ overlap (-3.9%)
property read	140,845 ops/sec [137,382..147,568] → 146,413 ops/sec [143,657..148,572]	~ overlap (+4.0%)	705,144 ops/sec [682,339..787,703] → 712,641 ops/sec [695,893..805,470]	~ overlap (+1.1%)
Object.keys	75,494 ops/sec [71,710..78,372] → 76,325 ops/sec [75,066..80,242]	~ overlap (+1.1%)	90,419 ops/sec [89,834..107,211] → 86,535 ops/sec [85,084..87,757]	🔴 -4.3%
Object.keys over 2000 descending-inserted index keys	523 ops/sec [517..529] → 507 ops/sec [490..518]	~ overlap (-3.1%)	457 ops/sec [408..521] → 413 ops/sec [398..416]	~ overlap (-9.6%)
Object.entries	50,124 ops/sec [49,271..52,817] → 50,833 ops/sec [47,410..56,991]	~ overlap (+1.4%)	51,523 ops/sec [51,347..51,607] → 54,624 ops/sec [49,408..67,686]	~ overlap (+6.0%)
spread operator	56,844 ops/sec [56,329..62,342] → 56,904 ops/sec [55,973..57,614]	~ overlap (+0.1%)	63,176 ops/sec [62,992..63,881] → 62,687 ops/sec [61,463..65,360]	~ overlap (-0.8%)

promises.js — Interp: 🔴 2, 10 unch. · avg -1.8% · Bytecode: 🟢 1, 11 unch. · avg -1.7%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
Promise.resolve(value)	90,651 ops/sec [88,992..95,281] → 93,306 ops/sec [91,360..98,341]	~ overlap (+2.9%)	100,513 ops/sec [92,170..104,325] → 95,945 ops/sec [94,387..96,108]	~ overlap (-4.5%)
new Promise(resolve => resolve(value))	63,593 ops/sec [60,545..66,972] → 62,250 ops/sec [61,433..87,232]	~ overlap (-2.1%)	76,300 ops/sec [71,519..78,094] → 73,053 ops/sec [72,090..88,355]	~ overlap (-4.3%)
Promise.reject(reason)	89,480 ops/sec [88,988..98,319] → 87,817 ops/sec [87,675..88,364]	🔴 -1.9%	93,278 ops/sec [92,044..100,441] → 92,008 ops/sec [90,537..101,706]	~ overlap (-1.4%)
resolve + then (1 handler)	33,148 ops/sec [32,529..35,031] → 31,291 ops/sec [30,511..32,397]	🔴 -5.6%	31,156 ops/sec [30,224..32,144] → 34,694 ops/sec [30,197..38,774]	~ overlap (+11.4%)
resolve + then chain (3 deep)	13,367 ops/sec [13,154..13,609] → 13,673 ops/sec [13,209..14,356]	~ overlap (+2.3%)	13,037 ops/sec [12,589..13,509] → 12,988 ops/sec [12,626..15,858]	~ overlap (-0.4%)
resolve + then chain (10 deep)	4,517 ops/sec [4,359..4,529] → 4,494 ops/sec [4,356..5,797]	~ overlap (-0.5%)	4,993 ops/sec [4,182..5,042] → 4,144 ops/sec [4,088..4,286]	~ overlap (-17.0%)
reject + catch + then	18,555 ops/sec [18,006..19,052] → 18,097 ops/sec [17,327..18,744]	~ overlap (-2.5%)	18,006 ops/sec [16,749..18,594] → 17,462 ops/sec [17,123..17,538]	~ overlap (-3.0%)
resolve + finally + then	8,936 ops/sec [8,848..10,672] → 9,311 ops/sec [8,824..9,690]	~ overlap (+4.2%)	7,631 ops/sec [7,436..7,742] → 7,866 ops/sec [7,779..7,993]	🟢 +3.1%
Promise.all (5 resolved)	6,474 ops/sec [6,410..6,494] → 6,200 ops/sec [6,010..6,710]	~ overlap (-4.2%)	5,198 ops/sec [5,099..5,372] → 5,364 ops/sec [5,152..5,441]	~ overlap (+3.2%)
Promise.race (5 resolved)	7,370 ops/sec [7,120..7,402] → 6,949 ops/sec [6,769..7,392]	~ overlap (-5.7%)	6,432 ops/sec [5,829..6,732] → 5,985 ops/sec [5,920..6,050]	~ overlap (-6.9%)
Promise.allSettled (5 mixed)	5,565 ops/sec [5,545..5,660] → 5,338 ops/sec [5,180..5,845]	~ overlap (-4.1%)	4,658 ops/sec [4,498..5,613] → 4,545 ops/sec [4,463..4,572]	~ overlap (-2.4%)
Promise.any (5 mixed)	6,710 ops/sec [6,665..6,742] → 6,382 ops/sec [6,200..6,842]	~ overlap (-4.9%)	5,318 ops/sec [5,271..5,466] → 5,391 ops/sec [5,286..5,458]	~ overlap (+1.4%)

property-access.js — Interp: 5 unch. · avg +0.7% · Bytecode: 5 unch. · avg -0.6%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
class instance fields across 1000 instances	194 ops/sec [188..197] → 195 ops/sec [194..208]	~ overlap (+0.3%)	2,569 ops/sec [2,558..2,580] → 2,582 ops/sec [2,509..2,636]	~ overlap (+0.5%)
object literal fields across 1000 literals	200 ops/sec [195..202] → 202 ops/sec [198..205]	~ overlap (+1.2%)	2,562 ops/sec [2,523..2,570] → 2,490 ops/sec [2,484..2,567]	~ overlap (-2.8%)
mixed-shape literals across 1000 literals	200 ops/sec [197..202] → 205 ops/sec [197..220]	~ overlap (+2.1%)	2,098 ops/sec [2,048..2,165] → 2,093 ops/sec [2,086..2,095]	~ overlap (-0.2%)
own-class method across 1000 instances	118 ops/sec [117..119] → 118 ops/sec [115..130]	~ overlap (-0.2%)	1,514 ops/sec [1,506..1,681] → 1,498 ops/sec [1,484..1,527]	~ overlap (-1.1%)
inherited method across 1000 instances	131 ops/sec [131..132] → 131 ops/sec [124..136]	~ overlap (+0.0%)	1,707 ops/sec [1,667..1,746] → 1,720 ops/sec [1,677..1,736]	~ overlap (+0.7%)

regexp.js — Interp: 🟢 2, 🔴 1, 10 unch. · avg +0.7% · Bytecode: 🟢 2, 🔴 2, 9 unch. · avg -2.4%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
regex literal creation	9,090 ops/sec [9,002..10,040] → 9,349 ops/sec [9,135..9,594]	~ overlap (+2.9%)	318,941 ops/sec [305,964..324,879] → 306,688 ops/sec [294,215..308,114]	~ overlap (-3.8%)
new RegExp(pattern, flags)	8,864 ops/sec [8,779..8,896] → 9,057 ops/sec [8,973..9,199]	🟢 +2.2%	7,940 ops/sec [7,800..11,401] → 7,884 ops/sec [7,833..8,319]	~ overlap (-0.7%)
RegExp(existingRegex) returns the same regex	189,877 ops/sec [183,463..191,764] → 190,594 ops/sec [176,920..219,396]	~ overlap (+0.4%)	386,341 ops/sec [385,030..391,203] → 423,496 ops/sec [421,558..423,789]	🟢 +9.6%
test() on a global regex	90,406 ops/sec [85,413..92,211] → 91,925 ops/sec [88,970..99,379]	~ overlap (+1.7%)	127,145 ops/sec [126,075..128,503] → 123,350 ops/sec [119,421..136,263]	~ overlap (-3.0%)
exec() with capture groups	45,881 ops/sec [45,088..47,271] → 46,947 ops/sec [44,373..47,710]	~ overlap (+2.3%)	48,364 ops/sec [43,937..49,653] → 49,323 ops/sec [46,169..54,200]	~ overlap (+2.0%)
toString()	59,976 ops/sec [59,621..61,533] → 60,698 ops/sec [59,418..60,884]	~ overlap (+1.2%)	60,184 ops/sec [60,016..64,980] → 58,433 ops/sec [55,999..61,516]	~ overlap (-2.9%)
match() with global regex	39,383 ops/sec [39,105..43,170] → 38,497 ops/sec [37,557..39,218]	~ overlap (-2.2%)	44,706 ops/sec [43,259..45,100] → 42,153 ops/sec [40,891..43,736]	~ overlap (-5.7%)
match() with many global results	6,078 ops/sec [5,986..6,184] → 5,854 ops/sec [5,529..5,954]	🔴 -3.7%	6,150 ops/sec [5,300..6,903] → 5,022 ops/sec [4,946..5,255]	🔴 -18.3%
matchAll() with capture groups	11,787 ops/sec [11,646..13,616] → 11,660 ops/sec [11,534..12,805]	~ overlap (-1.1%)	14,384 ops/sec [13,911..14,927] → 13,605 ops/sec [13,306..13,969]	~ overlap (-5.4%)
replace() with global regex	38,988 ops/sec [38,404..39,321] → 39,967 ops/sec [38,635..40,007]	~ overlap (+2.5%)	44,774 ops/sec [44,514..45,564] → 41,886 ops/sec [40,761..42,098]	🔴 -6.5%
replace() with many global results	9,448 ops/sec [9,431..9,457] → 9,571 ops/sec [9,009..9,835]	~ overlap (+1.3%)	7,802 ops/sec [7,776..9,181] → 7,894 ops/sec [7,794..8,656]	~ overlap (+1.2%)
search() with regex	60,913 ops/sec [60,034..61,661] → 59,437 ops/sec [57,518..61,551]	~ overlap (-2.4%)	84,646 ops/sec [81,379..88,166] → 84,099 ops/sec [83,169..84,978]	~ overlap (-0.6%)
split() with regex separator	27,742 ops/sec [26,813..28,674] → 28,872 ops/sec [28,832..29,060]	🟢 +4.1%	28,074 ops/sec [27,909..28,374] → 28,928 ops/sec [28,568..29,131]	🟢 +3.0%

strings.js — Interp: 🟢 2, 🔴 5, 12 unch. · avg -1.0% · Bytecode: 🟢 1, 🔴 2, 16 unch. · avg +0.9%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
string concatenation	101,531 ops/sec [99,614..104,419] → 99,144 ops/sec [98,136..101,741]	~ overlap (-2.4%)	1,096,512 ops/sec [1,051,282..1,171,418] → 1,093,907 ops/sec [1,085,722..1,179,375]	~ overlap (-0.2%)
template literal	158,694 ops/sec [156,653..170,827] → 176,341 ops/sec [156,587..187,745]	~ overlap (+11.1%)	983,706 ops/sec [978,832..1,120,836] → 1,028,717 ops/sec [995,794..1,171,442]	~ overlap (+4.6%)
string repeat	130,905 ops/sec [128,440..133,840] → 135,836 ops/sec [133,579..148,193]	~ overlap (+3.8%)	246,187 ops/sec [240,683..256,855] → 249,962 ops/sec [234,444..308,635]	~ overlap (+1.5%)
split and join	52,470 ops/sec [51,615..52,947] → 52,347 ops/sec [50,835..53,449]	~ overlap (-0.2%)	87,901 ops/sec [83,405..111,603] → 87,196 ops/sec [85,481..92,691]	~ overlap (-0.8%)
indexOf and includes	58,162 ops/sec [57,763..59,073] → 57,557 ops/sec [57,099..58,652]	~ overlap (-1.0%)	216,859 ops/sec [214,594..228,183] → 220,340 ops/sec [214,796..223,792]	~ overlap (+1.6%)
toUpperCase and toLowerCase	51,212 ops/sec [50,389..54,734] → 47,409 ops/sec [46,723..50,884]	~ overlap (-7.4%)	76,679 ops/sec [75,101..86,887] → 75,629 ops/sec [75,494..75,799]	~ overlap (-1.4%)
slice and substring	55,969 ops/sec [54,280..56,374] → 56,968 ops/sec [56,461..57,112]	🟢 +1.8%	149,608 ops/sec [145,787..175,346] → 158,645 ops/sec [158,022..159,070]	~ overlap (+6.0%)
trim operations	61,457 ops/sec [59,698..61,872] → 62,563 ops/sec [61,610..63,198]	~ overlap (+1.8%)	175,257 ops/sec [174,743..178,072] → 175,972 ops/sec [172,493..181,827]	~ overlap (+0.4%)
replace and replaceAll	64,023 ops/sec [63,424..64,650] → 65,651 ops/sec [65,367..65,874]	🟢 +2.5%	162,649 ops/sec [160,293..173,962] → 163,270 ops/sec [160,842..166,572]	~ overlap (+0.4%)
startsWith and endsWith	49,724 ops/sec [47,367..54,258] → 47,809 ops/sec [47,562..47,967]	~ overlap (-3.9%)	200,708 ops/sec [199,479..207,801] → 191,064 ops/sec [186,947..197,262]	🔴 -4.8%
padStart and padEnd	69,748 ops/sec [69,499..69,817] → 67,868 ops/sec [65,807..68,077]	🔴 -2.7%	168,559 ops/sec [159,989..173,822] → 158,741 ops/sec [157,056..178,829]	~ overlap (-5.8%)
identity tag, no substitutions	128,698 ops/sec [125,631..132,519] → 122,658 ops/sec [120,070..125,598]	🔴 -4.7%	251,465 ops/sec [221,072..306,833] → 239,652 ops/sec [219,469..283,471]	~ overlap (-4.7%)
tag with 1 substitution	34,297 ops/sec [33,723..34,688] → 32,096 ops/sec [31,560..32,146]	🔴 -6.4%	51,566 ops/sec [51,040..57,986] → 56,772 ops/sec [55,071..57,835]	~ overlap (+10.1%)
tag with 3 substitutions	19,635 ops/sec [19,260..19,697] → 18,602 ops/sec [18,351..21,237]	~ overlap (-5.3%)	34,140 ops/sec [33,223..35,099] → 35,628 ops/sec [34,794..35,832]	~ overlap (+4.4%)
tag with 6 substitutions	11,654 ops/sec [11,540..11,679] → 11,291 ops/sec [11,109..11,429]	🔴 -3.1%	21,171 ops/sec [20,827..21,898] → 21,685 ops/sec [21,500..21,876]	~ overlap (+2.4%)
String.raw, no substitutions	118,449 ops/sec [111,196..121,628] → 111,882 ops/sec [109,759..116,239]	~ overlap (-5.5%)	114,793 ops/sec [113,606..115,913] → 116,739 ops/sec [115,595..117,802]	~ overlap (+1.7%)
String.raw, 2 substitutions	71,284 ops/sec [70,824..76,554] → 75,133 ops/sec [72,454..75,578]	~ overlap (+5.4%)	102,827 ops/sec [101,393..104,201] → 102,405 ops/sec [101,446..103,651]	~ overlap (-0.4%)
tag accessing .raw array	53,726 ops/sec [53,603..53,828] → 52,901 ops/sec [50,377..56,213]	~ overlap (-1.5%)	85,959 ops/sec [85,873..86,469] → 83,970 ops/sec [83,641..84,528]	🔴 -2.3%
method as tag (this binding)	22,378 ops/sec [22,254..22,601] → 21,955 ops/sec [21,470..22,038]	🔴 -1.9%	41,551 ops/sec [40,450..43,280] → 43,485 ops/sec [43,334..43,675]	🟢 +4.7%

temporal.js — Interp: 🟢 1, 5 unch. · avg +1.6% · Bytecode: 6 unch. · avg -1.4%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
PlainDate.add({ months: 1 })	54,950 ops/sec [53,047..57,309] → 55,679 ops/sec [53,220..64,447]	~ overlap (+1.3%)	55,437 ops/sec [54,953..56,643] → 54,999 ops/sec [54,041..56,336]	~ overlap (-0.8%)
PlainDate.until(..., { largestUnit: 'months' })	63,224 ops/sec [61,760..65,200] → 63,704 ops/sec [63,387..69,218]	~ overlap (+0.8%)	69,807 ops/sec [68,646..70,004] → 70,571 ops/sec [67,971..85,333]	~ overlap (+1.1%)
Duration.total days relative to PlainDate	50,586 ops/sec [48,358..51,217] → 47,912 ops/sec [47,329..48,965]	~ overlap (-5.3%)	52,844 ops/sec [49,114..57,978] → 50,831 ops/sec [49,171..51,617]	~ overlap (-3.8%)
Duration.round to hours	41,044 ops/sec [38,678..42,074] → 41,884 ops/sec [39,487..44,738]	~ overlap (+2.0%)	40,649 ops/sec [39,683..42,247] → 39,901 ops/sec [38,936..44,423]	~ overlap (-1.8%)
ZonedDateTime.from named time zone	9,415 ops/sec [9,368..11,206] → 9,913 ops/sec [9,884..9,977]	~ overlap (+5.3%)	9,391 ops/sec [9,136..9,795] → 9,369 ops/sec [9,057..11,044]	~ overlap (-0.2%)
ZonedDateTime.since across DST	10,698 ops/sec [10,666..10,800] → 11,315 ops/sec [11,290..11,342]	🟢 +5.8%	10,919 ops/sec [10,723..10,934] → 10,612 ops/sec [10,587..10,762]	~ overlap (-2.8%)

tsv.js — Interp: 9 unch. · avg -0.1% · Bytecode: 🟢 2, 7 unch. · avg +4.4%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
parse simple 3-column TSV	43,784 ops/sec [43,326..47,648] → 44,003 ops/sec [41,157..44,758]	~ overlap (+0.5%)	47,439 ops/sec [46,900..48,442] → 51,374 ops/sec [49,487..53,379]	🟢 +8.3%
parse 10-row TSV	12,146 ops/sec [11,684..12,991] → 12,265 ops/sec [11,691..12,650]	~ overlap (+1.0%)	11,521 ops/sec [11,311..11,930] → 11,427 ops/sec [11,346..11,448]	~ overlap (-0.8%)
parse 100-row TSV	2,018 ops/sec [1,968..2,042] → 2,039 ops/sec [2,000..2,061]	~ overlap (+1.0%)	1,824 ops/sec [1,816..1,871] → 1,943 ops/sec [1,891..1,994]	🟢 +6.6%
parse TSV with backslash-escaped fields	10,749 ops/sec [10,351..11,067] → 11,090 ops/sec [10,917..11,240]	~ overlap (+3.2%)	10,030 ops/sec [9,624..10,869] → 10,395 ops/sec [10,362..10,473]	~ overlap (+3.6%)
parse without headers (array of arrays)	6,312 ops/sec [6,210..6,495] → 6,200 ops/sec [6,037..6,307]	~ overlap (-1.8%)	5,801 ops/sec [5,531..6,990] → 6,826 ops/sec [6,271..7,365]	~ overlap (+17.7%)
stringify array of objects	12,731 ops/sec [11,937..12,834] → 12,633 ops/sec [11,804..13,346]	~ overlap (-0.8%)	12,390 ops/sec [12,042..12,965] → 12,233 ops/sec [12,019..13,029]	~ overlap (-1.3%)
stringify array of arrays	3,038 ops/sec [3,018..3,152] → 2,990 ops/sec [2,976..3,446]	~ overlap (-1.6%)	2,934 ops/sec [2,888..3,082] → 2,920 ops/sec [2,859..2,996]	~ overlap (-0.5%)
stringify with values needing escaping	10,259 ops/sec [10,205..10,707] → 10,057 ops/sec [9,608..10,964]	~ overlap (-2.0%)	10,051 ops/sec [9,925..11,867] → 10,669 ops/sec [10,473..10,751]	~ overlap (+6.2%)
parse then stringify	4,062 ops/sec [3,876..4,088] → 4,037 ops/sec [3,901..4,282]	~ overlap (-0.6%)	4,033 ops/sec [3,917..4,074] → 4,014 ops/sec [3,966..4,091]	~ overlap (-0.5%)

typed-arrays.js — Interp: 🟢 6, 🔴 3, 13 unch. · avg +4.3% · Bytecode: 🟢 5, 🔴 4, 13 unch. · avg -3.1%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
new Int32Array(0)	128,693 ops/sec [128,170..128,889] → 130,786 ops/sec [129,979..131,690]	🟢 +1.6%	192,179 ops/sec [187,332..194,665] → 182,863 ops/sec [182,529..183,386]	🔴 -4.8%
new Int32Array(100)	123,838 ops/sec [118,328..124,272] → 122,709 ops/sec [121,741..122,929]	~ overlap (-0.9%)	164,555 ops/sec [160,679..165,604] → 167,154 ops/sec [163,722..169,377]	~ overlap (+1.6%)
new Int32Array(1000)	98,650 ops/sec [97,420..101,587] → 100,302 ops/sec [99,803..101,849]	~ overlap (+1.7%)	109,092 ops/sec [96,585..134,036] → 115,396 ops/sec [114,748..115,876]	~ overlap (+5.8%)
new Float64Array(100)	118,638 ops/sec [107,116..136,688] → 120,600 ops/sec [120,091..121,561]	~ overlap (+1.7%)	156,729 ops/sec [153,663..161,841] → 158,814 ops/sec [156,023..173,197]	~ overlap (+1.3%)
Int32Array.from([...])	2,658 ops/sec [2,586..2,707] → 2,506 ops/sec [2,463..2,576]	🔴 -5.7%	2,051 ops/sec [1,905..2,353] → 2,124 ops/sec [2,048..2,152]	~ overlap (+3.5%)
Int32Array.of(1, 2, 3, 4, 5)	86,247 ops/sec [84,087..98,258] → 83,698 ops/sec [82,244..84,116]	~ overlap (-3.0%)	96,343 ops/sec [94,774..96,827] → 99,904 ops/sec [99,703..100,303]	🟢 +3.7%
sequential write 100 elements	1,473 ops/sec [1,457..1,483] → 1,526 ops/sec [1,502..1,543]	🟢 +3.6%	17,723 ops/sec [17,431..17,753] → 17,570 ops/sec [17,221..17,868]	~ overlap (-0.9%)
sequential read 100 elements	1,644 ops/sec [1,620..1,656] → 1,602 ops/sec [1,597..1,608]	🔴 -2.6%	17,466 ops/sec [17,110..17,823] → 16,865 ops/sec [16,641..17,043]	🔴 -3.4%
Float64Array write 100 elements	1,399 ops/sec [1,392..1,461] → 1,396 ops/sec [1,366..1,400]	~ overlap (-0.2%)	13,101 ops/sec [12,954..13,178] → 13,570 ops/sec [13,369..14,437]	🟢 +3.6%
fill(42)	8,409 ops/sec [8,350..8,512] → 8,429 ops/sec [8,407..9,835]	~ overlap (+0.2%)	7,845 ops/sec [7,781..7,882] → 8,816 ops/sec [8,740..9,666]	🟢 +12.4%
slice()	85,364 ops/sec [84,815..85,584] → 84,634 ops/sec [81,372..93,583]	~ overlap (-0.9%)	89,357 ops/sec [88,819..89,833] → 140,793 ops/sec [132,066..141,238]	🟢 +57.6%
map(x => x * 2)	2,512 ops/sec [2,496..2,535] → 2,442 ops/sec [2,372..2,621]	~ overlap (-2.8%)	3,169 ops/sec [3,016..3,280] → 3,146 ops/sec [3,047..3,225]	~ overlap (-0.7%)
filter(x => x > 50)	2,473 ops/sec [2,456..2,488] → 2,374 ops/sec [2,357..2,381]	🔴 -4.0%	5,497 ops/sec [3,243..5,532] → 3,293 ops/sec [3,245..3,314]	~ overlap (-40.1%)
reduce (sum)	2,586 ops/sec [2,378..2,909] → 2,386 ops/sec [2,372..2,451]	~ overlap (-7.8%)	3,079 ops/sec [3,072..3,086] → 3,061 ops/sec [3,010..3,064]	🔴 -0.6%
sort()	26,222 ops/sec [25,932..26,244] → 26,345 ops/sec [26,053..26,561]	~ overlap (+0.5%)	45,955 ops/sec [27,123..46,158] → 26,614 ops/sec [25,673..27,487]	~ overlap (-42.1%)
indexOf()	36,739 ops/sec [35,946..38,208] → 36,791 ops/sec [36,525..37,050]	~ overlap (+0.1%)	70,020 ops/sec [69,734..70,219] → 50,952 ops/sec [40,002..71,903]	~ overlap (-27.2%)
reverse()	36,937 ops/sec [36,845..37,039] → 38,781 ops/sec [38,322..62,751]	🟢 +5.0%	72,034 ops/sec [71,983..72,311] → 40,903 ops/sec [40,320..42,784]	🔴 -43.2%
create view over existing buffer	139,759 ops/sec [138,966..143,836] → 223,872 ops/sec [222,504..224,548]	🟢 +60.2%	385,399 ops/sec [384,331..387,088] → 389,842 ops/sec [387,584..391,748]	🟢 +1.2%
subarray()	98,713 ops/sec [98,283..98,933] → 146,993 ops/sec [146,171..147,390]	🟢 +48.9%	180,956 ops/sec [180,406..181,857] → 187,982 ops/sec [179,983..188,559]	~ overlap (+3.9%)
set() from array	165,066 ops/sec [163,799..165,601] → 162,817 ops/sec [162,244..164,131]	~ overlap (-1.4%)	251,490 ops/sec [234,873..253,613] → 253,416 ops/sec [250,491..254,585]	~ overlap (+0.8%)
for-of loop	3,274 ops/sec [3,243..3,311] → 3,340 ops/sec [3,323..3,345]	🟢 +2.0%	25,651 ops/sec [25,608..25,776] → 25,726 ops/sec [25,702..25,771]	~ overlap (+0.3%)
spread into array	17,957 ops/sec [17,618..18,061] → 17,741 ops/sec [17,660..17,851]	~ overlap (-1.2%)	52,960 ops/sec [52,793..53,307] → 52,791 ops/sec [52,505..53,161]	~ overlap (-0.3%)

uint8array-encoding.js — Interp: 🟢 2, 🔴 3, 13 unch. · avg +0.4% · Bytecode: 🟢 1, 🔴 6, 11 unch. · avg -1.6%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
short (5 bytes)	211,817 ops/sec [206,354..218,069] → 209,226 ops/sec [208,476..209,537]	~ overlap (-1.2%)	402,157 ops/sec [393,850..403,353] → 379,924 ops/sec [378,010..381,079]	🔴 -5.5%
medium (450 bytes)	121,501 ops/sec [120,677..122,351] → 121,713 ops/sec [121,263..123,472]	~ overlap (+0.2%)	156,159 ops/sec [152,278..157,171] → 150,864 ops/sec [146,758..151,089]	🔴 -3.4%
large (4096 bytes)	28,417 ops/sec [28,152..28,697] → 28,665 ops/sec [27,409..28,856]	~ overlap (+0.9%)	25,561 ops/sec [24,911..29,198] → 25,579 ops/sec [25,258..26,123]	~ overlap (+0.1%)
base64url alphabet	95,897 ops/sec [94,197..96,723] → 96,779 ops/sec [94,722..104,265]	~ overlap (+0.9%)	117,152 ops/sec [116,343..117,758] → 112,648 ops/sec [111,868..113,912]	🔴 -3.8%
omitPadding	158,762 ops/sec [158,494..158,854] → 156,949 ops/sec [149,968..162,896]	~ overlap (-1.1%)	208,693 ops/sec [205,466..214,549] → 199,386 ops/sec [198,640..199,493]	🔴 -4.5%
short (8 chars)	140,402 ops/sec [140,185..140,987] → 141,478 ops/sec [139,077..142,357]	~ overlap (+0.8%)	198,146 ops/sec [192,352..198,478] → 191,460 ops/sec [190,179..194,955]	~ overlap (-3.4%)
medium (600 chars)	22,797 ops/sec [22,514..23,216] → 22,119 ops/sec [21,280..22,272]	🔴 -3.0%	19,734 ops/sec [19,393..19,824] → 19,756 ops/sec [19,626..19,897]	~ overlap (+0.1%)
large (5464 chars)	2,906 ops/sec [2,871..2,927] → 2,823 ops/sec [2,701..2,950]	~ overlap (-2.9%)	2,359 ops/sec [2,345..2,380] → 2,384 ops/sec [2,373..2,386]	~ overlap (+1.0%)
short (5 bytes)	212,808 ops/sec [212,269..217,724] → 210,271 ops/sec [207,985..212,796]	~ overlap (-1.2%)	415,206 ops/sec [401,459..422,746] → 388,622 ops/sec [385,062..393,597]	🔴 -6.4%
medium (450 bytes)	157,775 ops/sec [153,883..158,418] → 109,605 ops/sec [108,316..158,935]	~ overlap (-30.5%)	128,991 ops/sec [127,751..129,787] → 122,732 ops/sec [122,035..124,105]	🔴 -4.9%
large (4096 bytes)	30,697 ops/sec [29,751..31,524] → 30,704 ops/sec [29,246..31,010]	~ overlap (+0.0%)	19,865 ops/sec [18,911..21,101] → 19,310 ops/sec [19,023..20,284]	~ overlap (-2.8%)
short (10 chars)	239,814 ops/sec [238,936..241,651] → 240,474 ops/sec [239,179..241,271]	~ overlap (+0.3%)	259,489 ops/sec [235,386..279,713] → 244,776 ops/sec [242,853..245,778]	~ overlap (-5.7%)
medium (900 chars)	173,790 ops/sec [114,181..175,125] → 170,251 ops/sec [167,878..171,029]	~ overlap (-2.0%)	138,121 ops/sec [136,899..138,831] → 148,342 ops/sec [136,828..158,917]	~ overlap (+7.4%)
large (8192 chars)	34,618 ops/sec [34,239..34,641] → 51,630 ops/sec [51,582..52,079]	🟢 +49.1%	31,238 ops/sec [28,999..31,416] → 32,110 ops/sec [29,804..34,610]	~ overlap (+2.8%)
setFromBase64 (450 bytes)	32,952 ops/sec [32,830..32,973] → 33,671 ops/sec [33,286..33,767]	🟢 +2.2%	19,364 ops/sec [19,220..19,558] → 19,339 ops/sec [19,289..19,374]	~ overlap (-0.1%)
setFromHex (450 bytes)	35,709 ops/sec [35,644..35,758] → 35,558 ops/sec [35,352..35,615]	🔴 -0.4%	24,483 ops/sec [24,340..24,611] → 25,043 ops/sec [24,671..26,374]	🟢 +2.3%
toBase64 → fromBase64 (450 bytes)	30,799 ops/sec [30,621..30,818] → 30,511 ops/sec [30,162..30,729]	~ overlap (-0.9%)	17,735 ops/sec [17,657..18,022] → 18,010 ops/sec [17,590..19,239]	~ overlap (+1.5%)
toHex → fromHex (450 bytes)	95,983 ops/sec [95,190..96,842] → 92,499 ops/sec [91,438..94,298]	🔴 -3.6%	72,988 ops/sec [72,513..132,237] → 70,155 ops/sec [69,089..123,312]	~ overlap (-3.9%)

weak-collections.js — Interp: 🔴 1, 14 unch. · avg -2.7% · Bytecode: 🟢 7, 🔴 1, 7 unch. · avg +29.8%

Benchmark	Interpreted (main → PR)	Δ	Bytecode (main → PR)	Δ
constructor from 50 entries	11,108 ops/sec [10,780..12,111] → 10,958 ops/sec [10,574..11,273]	~ overlap (-1.4%)	9,348 ops/sec [9,133..9,809] → 9,327 ops/sec [9,173..9,562]	~ overlap (-0.2%)
set 50 object keys	3,740 ops/sec [3,702..3,801] → 3,658 ops/sec [3,597..3,732]	~ overlap (-2.2%)	7,459 ops/sec [7,400..7,472] → 8,054 ops/sec [7,721..8,124]	🟢 +8.0%
get lookups (50 entries)	46,468 ops/sec [45,001..48,225] → 46,870 ops/sec [46,661..49,923]	~ overlap (+0.9%)	179,578 ops/sec [178,545..199,350] → 308,547 ops/sec [307,727..309,170]	🟢 +71.8%
has checks (50 entries)	60,824 ops/sec [59,900..61,151] → 60,198 ops/sec [59,717..61,471]	~ overlap (-1.0%)	232,911 ops/sec [213,848..234,124] → 371,551 ops/sec [370,615..372,697]	🟢 +59.5%
delete entries	3,338 ops/sec [3,292..3,372] → 3,290 ops/sec [3,243..3,375]	~ overlap (-1.5%)	7,322 ops/sec [7,290..8,608] → 13,273 ops/sec [13,201..13,395]	🟢 +81.3%
non-registered symbol keys	8,097 ops/sec [7,964..8,145] → 7,993 ops/sec [7,868..8,099]	~ overlap (-1.3%)	18,646 ops/sec [18,338..32,237] → 31,629 ops/sec [30,964..31,847]	~ overlap (+69.6%)
getOrInsert	3,077 ops/sec [3,051..3,127] → 3,084 ops/sec [3,069..3,088]	~ overlap (+0.2%)	13,357 ops/sec [7,529..13,471] → 13,108 ops/sec [11,311..13,220]	~ overlap (-1.9%)
getOrInsertComputed	1,965 ops/sec [1,951..2,037] → 1,979 ops/sec [1,970..1,993]	~ overlap (+0.7%)	5,047 ops/sec [4,916..5,077] → 5,120 ops/sec [5,043..5,198]	~ overlap (+1.4%)
forced gc live-key retention	1,014 ops/sec [844..1,193] → 951 ops/sec [743..1,372]	~ overlap (-6.2%)	901 ops/sec [825..1,183] → 949 ops/sec [871..1,025]	~ overlap (+5.3%)
constructor from 50 values	13,722 ops/sec [13,470..13,791] → 13,478 ops/sec [13,047..13,800]	~ overlap (-1.8%)	11,905 ops/sec [11,715..12,624] → 12,826 ops/sec [12,460..13,053]	~ overlap (+7.7%)
add 50 object values	3,946 ops/sec [3,866..3,972] → 3,901 ops/sec [3,871..3,910]	~ overlap (-1.2%)	9,102 ops/sec [9,001..9,175] → 8,968 ops/sec [8,805..9,035]	~ overlap (-1.5%)
has checks (50 values)	63,092 ops/sec [62,771..63,248] → 62,834 ops/sec [62,328..69,917]	~ overlap (-0.4%)	236,107 ops/sec [229,686..236,843] → 376,891 ops/sec [374,929..378,038]	🟢 +59.6%
delete values	10,528 ops/sec [10,475..16,200] → 10,494 ops/sec [10,272..10,533]	~ overlap (-0.3%)	11,373 ops/sec [11,033..12,120] → 19,771 ops/sec [19,003..19,812]	🟢 +73.8%
non-registered symbol values	13,069 ops/sec [12,999..13,120] → 8,682 ops/sec [8,636..8,700]	🔴 -33.6%	34,926 ops/sec [34,832..35,143] → 34,478 ops/sec [34,340..34,576]	🔴 -1.3%
forced gc pruning smoke	1,299 ops/sec [1,226..1,390] → 1,417 ops/sec [1,377..1,431]	~ overlap (+9.1%)	1,788 ops/sec [1,771..1,794] → 2,033 ops/sec [2,009..2,036]	🟢 +13.7%

Deterministic profile diff

Deterministic profile diff: no significant changes.

_{Measured on ubuntu-latest x64. Each PR run also builds the main base and benchmarks it back-to-back on the same runner after a warm-up discard, so the ranges compare two runs measured under the same conditions; overlapping min/max ranges are treated as unchanged noise. Percentage deltas are secondary context. See docs/adr/0076.}

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Review comments at @source/units/Goccia.Builtins.TestingLibrary.pas:
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