pytester: avoid unraisableexception gc collects in inline runs to speed up test suite#13525
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nicoddemus merged 2 commits intopytest-dev:mainfrom Jun 16, 2025
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…ed up test suite Because `pytester.runpytest()` executes the full session cycle (including `pytest_unconfigure`), it was calling `gc.collect()` in a loop multiple times—even for small, fast tests. This significantly increased the total test suite runtime. To optimize performance, disable the gc runs in inline pytester runs entirely, matching the behavior before pytest-dev#12958. Locally the test suite runtime improved dramatically, dropping from 425s to 160s. Fixes pytest-dev#13482. Co-authored-by: Bruno Oliveira <bruno@soliv.dev>
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Backport to 8.4.x: 💚 backport PR created✅ Backport PR branch: Backported as #13526 🤖 @patchback |
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…ed up test suite (#13525) Because `pytester.runpytest()` executes the full session cycle (including `pytest_unconfigure`), it was calling `gc.collect()` in a loop multiple times—even for small, fast tests. This significantly increased the total test suite runtime. To optimize performance, disable the gc runs in inline pytester runs entirely, matching the behavior before #12958. Locally the test suite runtime improved dramatically, dropping from 425s to 160s. Fixes #13482. Co-authored-by: Bruno Oliveira <bruno@soliv.dev> (cherry picked from commit 391324e)
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…ed up test suite (#13525) (#13526) Because `pytester.runpytest()` executes the full session cycle (including `pytest_unconfigure`), it was calling `gc.collect()` in a loop multiple times—even for small, fast tests. This significantly increased the total test suite runtime. To optimize performance, disable the gc runs in inline pytester runs entirely, matching the behavior before #12958. Locally the test suite runtime improved dramatically, dropping from 425s to 160s. Fixes #13482. (cherry picked from commit 391324e) Co-authored-by: Ran Benita <ran@unusedvar.com> Co-authored-by: Bruno Oliveira <bruno@soliv.dev>
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This is an alternative to #13513. I had to change some tests to run in a subprocess and tweak them a bit to make it work.
Fixes #13482.
Closes #13513.