gh-141473: Speed up subprocess test_communicate_timeout_large_input long tail#149003
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gpshead merged 1 commit intoApr 26, 2026
python:mainpython/cpython:mainfrom
gpshead:fix/test-communicate-timeout-loopbackgpshead/cpython:fix/test-communicate-timeout-loopbackCopy head branch name to clipboard
Merged
gh-141473: Speed up subprocess test_communicate_timeout_large_input long tail#149003gpshead merged 1 commit intopython:mainpython/cpython:mainfrom gpshead:fix/test-communicate-timeout-loopbackgpshead/cpython:fix/test-communicate-timeout-loopbackCopy head branch name to clipboard
gpshead merged 1 commit into
python:mainpython/cpython:mainfrom
gpshead:fix/test-communicate-timeout-loopbackgpshead/cpython:fix/test-communicate-timeout-loopbackCopy head branch name to clipboard
Conversation
Replace the slow reader's 30s sleep with a parent-driven wake over a loopback socket so post-timeout communicate() doesn't block waiting for the child to wake on its own. Worst-case runtime: ~30s -> <1s. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Thanks @gpshead for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14. |
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GH-149004 is a backport of this pull request to the 3.14 branch. |
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GH-149005 is a backport of this pull request to the 3.13 branch. |
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…input long tail (GH-149003) (#149005) gh-141473: Speed up subprocess test_communicate_timeout_large_input long tail (GH-149003) gh-141473: Speed up test_communicate_timeout_large_input Replace the slow reader's 30s sleep with a parent-driven wake over a loopback socket so post-timeout communicate() doesn't block waiting for the child to wake on its own. Worst-case runtime: ~30s -> <1s. (cherry picked from commit e1384cf) Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
gpshead
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Apr 26, 2026
…input long tail (GH-149003) (#149004) gh-141473: Speed up subprocess test_communicate_timeout_large_input long tail (GH-149003) gh-141473: Speed up test_communicate_timeout_large_input Replace the slow reader's 30s sleep with a parent-driven wake over a loopback socket so post-timeout communicate() doesn't block waiting for the child to wake on its own. Worst-case runtime: ~30s -> <1s. (cherry picked from commit e1384cf) Co-authored-by: Gregory P. Smith <68491+gpshead@users.noreply.github.com>
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Replace the slow reader's 30s sleep with a parent-driven wake over a loopback socket so post-timeout communicate() doesn't block waiting for the child to wake on its own. Worst-case runtime: ~30s -> <1s.