port lazy_loader perf and native PEP810 + add python3.15 support

[benedikt-bartscher]

scientific-python/lazy-loader#172
scientific-python/lazy-loader#173

[codspeed-hq]

Merging this PR will improve performance by 4.79%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 5 improved benchmarks
✅ 22 untouched benchmarks
⏩ 8 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	test_evaluate_page[_complicated_page]	27.3 ms	25.9 ms	+5.44%
⚡	Simulation	test_evaluate_page_with_hooks[_complicated_page]	27.6 ms	26.2 ms	+5.41%
⚡	Simulation	test_evaluate_page[_stateful_page]	4.5 ms	4.3 ms	+4.68%
⚡	Simulation	test_evaluate_page_with_hooks[_stateful_page]	4.7 ms	4.5 ms	+4.56%
⚡	Simulation	test_console_log	372.3 µs	358.4 µs	+3.88%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing benedikt-bartscher:use-lazy-loader-branch (130a9ee) with main (126ef6d)}

Footnotes

1. 8 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[greptile-apps]

Greptile Summary

The PR adds Python 3.15 CI and dependency resolution, introduces native PEP 810 lazy imports with package-level attribute caching, and replaces use of a removed private dataclasses type.

• Adds Python 3.15 to unit and integration workflow matrices.
• Uses native lazy imports on Python 3.15 and caches classic lazy-loader resolutions.
• Adds compatibility handling for dataclasses and TypedDict behavior.
• Adjusts psycopg dependency markers and lockfile resolution for Python 3.15.
• Marks known dill incompatibilities in Python 3.15 tests.

Confidence Score: 5/5

The PR appears safe to merge because no blocking failure remains within the eligible follow-up-review scope.

No blocking failure remains.

Important Files Changed

Filename	Overview
packages/reflex-base/src/reflex_base/utils/lazy_loader.py	Adds validated native PEP 810 bindings and caches resolved lazy attributes; no eligible follow-up defect was established.
packages/reflex-base/src/reflex_base/utils/compat.py	Introduces a public compatibility alias for the dataclasses missing-value sentinel type removed in Python 3.15.
packages/reflex-base/src/reflex_base/utils/types.py	Normalizes PEP 728 NoExtraItems sentinels when validating TypedDict values.
pyproject.toml	Selects pure-Python psycopg on Python 3.15 while retaining the binary extra on earlier versions.
uv.lock	Regenerates dependency markers and resolutions to distinguish Python 3.14 and 3.15 environments.
tests/units/test_state.py	Marks the known dill fallback incompatibility as expected on Python 3.15.
tests/integration/test_dynamic_components.py	Skips the known Python 3.15 dill incompatibility for Redis-backed dynamic-component testing.
.github/workflows/unit_tests.yml	Extends Linux, Windows, and macOS unit-test matrices to Python 3.15.

_{Reviews (8): Last reviewed commit: "Merge branch 'main' into use-lazy-loader..." | Re-trigger Greptile}

[cubic-dev-ai]

All reported issues were addressed across 17 files

<sub>Reply with feedback, questions, or to request a fix.

Re-trigger cubic</sub>