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

[benedikt-bartscher]

scientific-python/lazy-loader#172
scientific-python/lazy-loader#173 (merged)

[codspeed-hq]

Merging this PR will improve performance by 4.57%

⚠️ 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
✅ 27 untouched benchmarks
⏩ 8 skipped benchmarks¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_evaluate_page[_complicated_page]	26.5 ms	25.1 ms	+5.39%
⚡	test_evaluate_page_with_hooks[_complicated_page]	26.7 ms	25.4 ms	+5.32%
⚡	test_evaluate_page[_stateful_page]	4.6 ms	4.4 ms	+4.46%
⚡	test_evaluate_page_with_hooks[_stateful_page]	4.8 ms	4.6 ms	+4.17%
⚡	test_console_log	382.7 µs	369.7 µs	+3.53%

Tip

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

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_{Comparing benedikt-bartscher:use-lazy-loader-branch (7764f16) with main (7711b20)}

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

This PR adds Python 3.15 support and adopts native PEP 810 lazy imports where available.

• Caches resolved lazy attributes and adds native lazy-import bindings on Python 3.15.
• Replaces the removed private dataclasses sentinel type with a compatibility alias.
• Updates TypedDict compatibility handling, dependency markers, lock data, and CI matrices.
• Adds temporary test exceptions for dependencies not yet compatible with Python 3.15.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
packages/reflex-base/src/reflex_base/utils/lazy_loader.py	Adds cached lazy attributes and guarded native PEP 810 bindings; no eligible follow-up defect was established.
packages/reflex-base/src/reflex_base/utils/compat.py	Introduces a Python-version-compatible replacement for the removed private dataclasses sentinel type.
packages/reflex-base/src/reflex_base/utils/types.py	Normalizes PEP 728 NoExtraItems sentinels during runtime TypedDict validation.
pyproject.toml	Selects the pure-Python psycopg distribution on Python 3.15 while retaining binary extras on older versions.
uv.lock	Regenerates resolution markers and psycopg dependencies for Python 3.15.
.github/workflows/unit_tests.yml	Extends Linux, Windows, and macOS unit-test matrices to Python 3.15.
.github/workflows/integration_app_harness.yml	Extends Redis and in-memory integration matrices to Python 3.15.

_{Reviews (14): 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>