[PR #13422/356d355b backport][3.15] 🧪 Sync coveragepy setup w/ other projects

[webknjaz]

This is a backport of PR #13422 as merged into master (356d355).

[greptile-apps]

Confidence Score: 4/5

The PR appears safe to merge, with a non-blocking environment-ordering issue that can undermine the Autobahn parallel-mode override in externally configured test environments.

The existing CI does not define the conflicting environment variable and the coverage artifact paths remain consistent, but both Autobahn subprocess environments allow an inherited value to replace the explicit false setting.

Files Needing Attention: tests/autobahn/test_autobahn.py

_{Reviews (1): Last reviewed commit: "[PR #13422/356d355b backport][3.15] 🧪 S..." | Re-trigger Greptile}

[greptile-apps]

Inherited environment overrides opt-out

If the parent environment defines COVERAGE_PARALLEL_MODE=true, expanding os.environ after the explicit false value replaces the intended opt-out in both Autobahn subprocesses, allowing coverage run --append to use incompatible parallel collection. Reverse the mapping order so the explicit value always wins.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.20%. Comparing base (3b61410) to head (54c6178).
⚠️ Report is 8 commits behind head on 3.15.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             3.15   #13423      +/-   ##
==========================================
- Coverage   98.28%   96.20%   -2.09%     
==========================================
  Files         136      159      +23     
  Lines       49713    50895    +1182     
  Branches     2682     2772      +90     
==========================================
+ Hits        48861    48964     +103     
- Misses        672     1751    +1079     
  Partials      180      180              

Flag	Coverage Δ
CI-GHA	96.17% <100.00%> (-2.11%)	⬇️
OS-Linux	95.96% <100.00%> (-2.11%)	⬇️
OS-Windows	93.68% <100.00%> (-2.06%)	⬇️
OS-macOS	95.13% <100.00%> (-2.11%)	⬇️
Py-3.10	95.31% <100.00%> (-2.10%)	⬇️
Py-3.11	95.58% <100.00%> (-2.11%)	⬇️
Py-3.12	95.66% <100.00%> (-2.11%)	⬇️
Py-3.13	95.65% <100.00%> (-2.10%)	⬇️
Py-3.14	95.75% <100.00%> (-2.11%)	⬇️
Py-3.14t	94.76% <100.00%> (-2.09%)	⬇️
Py-pypy-3.11	94.61% <100.00%> (-2.07%)	⬇️
VM-macos	95.13% <100.00%> (-2.11%)	⬇️
VM-ubuntu	95.96% <100.00%> (-2.11%)	⬇️
VM-windows	93.68% <100.00%> (-2.06%)	⬇️
cython-coverage	78.04% <ø> (+39.36%)	⬆️

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[codspeed-hq]

Merging this PR will improve performance by 9.08%

⚠️ 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

⚡ 1 improved benchmark
✅ 83 untouched benchmarks
⏩ 86 skipped benchmarks¹

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
⚡	test_simple_web_file_response[ssl-large-pyloop]	305.5 ms	280.1 ms	+9.08%

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 webknjaz:patchback/backports/3.15/356d355b7928ada4c2deb86e13992310b33d52f9/pr-13422/handcrafted-cherry-pick-by-webknjaz (54c6178) with 3.15 (94209dc)²}

Footnotes

1. 86 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. ↩

2. No successful run was found on 3.15 (0f4084b) during the generation of this report, so 94209dc was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩