[PR #13525/391324e1 backport][8.4.x] pytester: avoid unraisableexception gc collects in inline runs to speed up test suite #13526
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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 <[email protected]> (cherry picked from commit 391324e)
nicoddemus
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Jun 16, 2025
nicoddemus
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This is a backport of PR #13525 as merged into main (391324e).
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.