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build(browser): Inline all constants in CDN bundles - #26356

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@msonnb msonnb commented Nov 13, 2026

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Why: Rolldown's default inlineConst: { mode: 'smart' } inlines constants only inside conditions. Frequently used strings, mostly from @sentry/conventions, therefore end up both as a variable and as literal copies: sentry.op is one variable plus about 10 literals in bundle.tracing.min.js. With mode: 'all' every use becomes a literal. Raw size grows, but gzip handles repeated literals better than variable references, so what users download gets smaller:

raw gzip
all 54 browser .min.js bundles +24.5 KB −2.4 KB
bundle.min.js +125 B −41 B
bundle.tracing.min.js +1.4 KB −132 B
bundle.tracing.replay.min.js +1.4 KB −145 B
bundle.tracing.logs.metrics.min.js +1.6 KB −172 B

inlineConst: false went the other way: −3.9 KB raw, +261 B gzip. pass: 2 made no difference. This only touches the CDN bundle config, not npm builds.

How to review: Single config line. I ran the browser integration tests against bundle_tracing_replay_min: 641 passed, and 1 failed. That one (web-vitals-cls-without-array-at) also fails on develop locally.

🤖 Generated with Claude Code

Rolldown's default `inlineConst: 'smart'` only inlines constants in
conditions, so frequently used `@sentry/conventions` strings end up both as a
variable and as literal copies. Inlining everywhere grows the raw output but
shrinks the gzipped CDN bundles by ~90-170 B each.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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size-limit report 📦

Compared: 583af81 (PR test merge using develop at 88cc648)

Against: 88cc648 (develop) · base run #66002

✅ Baseline matches: this diff contains only this PR's changes.

Path Size % Change Change
@sentry/browser 30.1 kB - -
@sentry/browser - with treeshaking flags 28.3 kB - -
@sentry/browser - with treeshaking flags tracing without tracing 28.2 kB - -
@sentry/browser (incl. Tracing) 52.28 kB - -
@sentry/browser (incl. Tracing + Span Streaming) 52.29 kB - -
@sentry/browser (incl. Tracing, Profiling) 55.25 kB - -
@sentry/browser (incl. Tracing, Replay) 92.82 kB - -
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags 81.6 kB - -
@sentry/browser (incl. Tracing, Replay with Canvas) 97.21 kB - -
@sentry/browser (incl. Tracing, Replay, Feedback) 110.6 kB - -
@sentry/browser (incl. Feedback) 47.73 kB - -
@sentry/browser (incl. sendFeedback) 30.69 kB - -
@sentry/browser (incl. FeedbackAsync) 35.69 kB - -
@sentry/browser (incl. Metrics) 31.43 kB - -
@sentry/browser (incl. Logs) 31.71 kB - -
@sentry/browser (incl. Metrics & Logs) 32.37 kB - -
@sentry/react 32.11 kB - -
@sentry/react (incl. Tracing) 54.95 kB - -
@sentry/vue 38.3 kB - -
@sentry/vue (incl. Tracing) 55.24 kB - -
@sentry/svelte 30.12 kB - -
@sentry/remix (Remix 3 client bundle) 58.06 kB - -
CDN Bundle 31.89 kB +0.06% +18 B 🔺
CDN Bundle (incl. Tracing) 52.56 kB -0.27% -140 B 🔽
CDN Bundle (incl. Logs, Metrics) 34.64 kB -0.09% -29 B 🔽
CDN Bundle (incl. Tracing, Logs, Metrics) 55.11 kB -0.28% -154 B 🔽
CDN Bundle (incl. Replay, Logs, Metrics) 75.67 kB -0.05% -32 B 🔽
CDN Bundle (incl. Tracing, Replay) 90.56 kB -0.18% -160 B 🔽
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) 93.14 kB -0.2% -183 B 🔽
CDN Bundle (incl. Tracing, Replay, Feedback) 96.09 kB +0.01% +6 B 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) 98.62 kB -0.07% -65 B 🔽
CDN Bundle - uncompressed 93.11 kB +0.14% +121 B 🔺
CDN Bundle (incl. Tracing) - uncompressed 156.82 kB +0.89% +1.37 kB 🔺
CDN Bundle (incl. Logs, Metrics) - uncompressed 101.53 kB +0.21% +209 B 🔺
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed 164.64 kB +0.96% +1.55 kB 🔺
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed 231.65 kB +0.1% +215 B 🔺
CDN Bundle (incl. Tracing, Replay) - uncompressed 276.98 kB +0.51% +1.38 kB 🔺
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed 284.79 kB +0.56% +1.56 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed 289.08 kB +0.59% +1.69 kB 🔺
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed 296.89 kB +0.64% +1.87 kB 🔺
@sentry/nextjs (client) 58.34 kB - -
@sentry/sveltekit (client) 53.36 kB - -
@sentry/core/server 44.57 kB - -
@sentry/core/browser 13.99 kB - -
@sentry/node 149.6 kB +0.04% +50 B 🔺
@sentry/node/import (ESM hook with diagnostics-channel injection) 83.3 kB - -
@sentry/node - without tracing 88.53 kB +0.06% +48 B 🔺
@sentry/node - without channel injection 138.54 kB +0.04% +45 B 🔺
@sentry/aws-serverless 97.44 kB +0.05% +47 B 🔺
@sentry/cloudflare (withSentry) - minified 204.55 kB - -
@sentry/cloudflare (withSentry) 474.76 kB - -
@sentry/nextjs/cloudflare (withSentry) - minified 229.86 kB - -

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@msonnb msonnb closed this Nov 13, 2026
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