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Title: GH-139951: Fix major GC performance regression by markshannon · Pull Request #140262 · python/cpython · GitHub

Open Graph Title: GH-139951: Fix major GC performance regression by markshannon · Pull Request #140262 · python/cpython

X Title: GH-139951: Fix major GC performance regression by markshannon · Pull Request #140262 · python/cpython

Description: This PR: Counts number of actually tracked objects, instead of trackable objects. This ensures that untracking tuples has the desired effect of reducing GC overhead Does not track most untrackable...

Open Graph Description: This PR: Counts number of actually tracked objects, instead of trackable objects. This ensures that untracking tuples has the desired effect of reducing GC overhead Does not track most untrackable...

X Description: This PR: Counts number of actually tracked objects, instead of trackable objects. This ensures that untracking tuples has the desired effect of reducing GC overhead Does not track most untrackable...

Opengraph URL: https://github.com/python/cpython/pull/140262

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pythonGH-139951https://github.com/python/cpython/issues/139951
: Fix major GC performance regression (https://github.com/miss-islington/cpython/commit/f778f01264caecd3cfe03458ef863fa65bf4c539
pythonGH-140262https://github.com/python/cpython/pull/140262
)https://github.com/miss-islington/cpython/commit/f778f01264caecd3cfe03458ef863fa65bf4c539
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Oct 21, 2025https://github.com/python/cpython/pull/140262#issuecomment-3426946605
GH-140423https://github.com/python/cpython/pull/140423
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Oct 21, 2025 https://github.com/python/cpython/pull/140262#ref-issue-3537249507
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Oct 21, 2025 https://github.com/python/cpython/pull/140262#ref-pullrequest-3515394217
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Oct 22, 2025 https://github.com/python/cpython/pull/140262#ref-pullrequest-3522061909
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: Fix major GC performance regression. Backport ofhttps://github.com/python/cpython/commit/d1a434f7b211b7061883b8cf4c8687cf00e0c2c7
GH…https://github.com/python/cpython/pull/140262
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gh-139951: Tests on tuple tracking #140575 https://github.com/python/cpython/pull/140575
pickletools optimize performance degraded with factor 3-4 in python 3.14 #140175 https://github.com/python/cpython/issues/140175
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Nov 27, 2025 https://github.com/python/cpython/pull/140262#ref-commit-fef3eed
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Revert GC changes to "work_to_do" logic.https://github.com/nascheme/cpython/commit/fef3eed829b8f69f38708059e75d25bd72825a6a
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pythonGH-140262https://github.com/python/cpython/pull/140262
pythonGH-139951https://github.com/python/cpython/issues/139951
GH-142002: Revert GC changes to "work_to_do" logic. #142001 https://github.com/python/cpython/pull/142001
Incremental GC does not collect garbage as soon as expected #142002 https://github.com/python/cpython/issues/142002
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pythonGH-139951https://github.com/python/cpython/issues/139951
: Fix major GC performance regression (https://github.com/StanFromIreland/cpython/commit/99c908ca131483da304e706940736e621ebebc4c
pythonGH-140262https://github.com/python/cpython/pull/140262
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Dec 10, 2025 https://github.com/python/cpython/pull/140262#ref-issue-3716569473
[3.14t] Free-threaded GC performance regression on tuples #142531 https://github.com/python/cpython/issues/142531
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Dec 18, 2025 https://github.com/python/cpython/pull/140262#ref-issue-3715500921
Observed memory leak in ssl library: Python 3.14 GC issue #142516 https://github.com/python/cpython/issues/142516
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