Description

pablogsal

opened on Oct 10, 2026

Issue body actions

This is a catch-all issue for improvements to the performance of the garbage collector.

Linked PRs

• gh-159137: Skip redundant GC resurrection analysis #159138
• gh-159137: gc: Count GC survivors in untrack_tuples() instead of walking the young generation again #159149
• gh-159137: Keep surviving objects in order in the garbage collector #159152
• gh-159137: Untrack tuples and count survivors in move_unreachable() #159154
• gh-159137: Restore known-root marking for the GIL garbage collector #159162
• gh-159137: Copy and subtract the GC reference counts in one walk #159163

Activity

1. pablogsal

   added 3 commits that reference this issue on Oct 10, 2026

   pythongh-159137: Use the current news directory name

   e12210f

   pythongh-159137: Remove the added GC tests

   239991d

   pythongh-159137: Skip redundant GC resurrection analysis

   86ae540
2. picnixz

   added

   type-featureA feature request or enhancementA feature request or enhancement

   performancePerformance or resource usagePerformance or resource usage

   interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

   type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

   and removed

   type-featureA feature request or enhancementA feature request or enhancement

   on Oct 10, 2026
3. pablogsal

   added 8 commits that reference this issue on Oct 10, 2026

   pythongh-159137: Skip redundant GC resurrection analysis

   d46924d

   pythongh-159137: Skip redundant GC resurrection analysis

   93b25be

   pythongh-159137: Skip redundant GC resurrection analysis

   8a5bd9a

   gh-159137: Skip redundant GC resurrection analysis (#159138)

   fbbf4f4

   pythongh-159137: Restore known-root marking for the GIL garbage colle…

   7bf0330

   pythongh-159137: Restore known-root marking for the GIL garbage colle…

   945ef05

   pythongh-159137: Use a shared GC breakpoint in GDB tests

   8c28240

   gh-159137: Untrack tuples and count survivors in move_unreachable() (#…

   e878e1e
4. orsenthil

   added 2 commits that reference this issue on Oct 11, 2026

   pythongh-159137: Skip redundant GC resurrection analysis (python#159138)

   79006ef

   pythongh-159137: Untrack tuples and count survivors in move_unreachab…

   6a32de1
5. pablogsal

   added a sub-issue on Oct 14, 2026

   • Avoid redundant garbage collector traversals #159437
6. kevinprimeraquecreo-stack

   added this to Project_VKon Oct 18, 2026
7. github-project-automation

   moved this to Todo in Project_VKon Oct 18, 2026
8. kevinprimeraquecreo-stack

   added this to Project_VKon Oct 18, 2026

Issue actions