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markshannon · markshannon · commit 6c78c018f8af · 2025-10-17T18:03:30.000+01:00
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-10-17-18-03-12.gh-issue-139951.IdwM2O.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-10-17-18-03-12.gh-issue-139951.IdwM2O.rst
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+Fixes a regression in GC performance for a growing heap composed mostly of
+small tuples.
+
+*  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 tuples during creation.
+   This prevents large numbers of small tuples causing excessive GCs.
