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gh-140476: Optimize PySet_Add() for frozenset in free-threading #140440

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Merged
kumaraditya303 merged 6 commits into from
Nov 11, 2025
Merged

gh-140476: Optimize PySet_Add() for frozenset in free-threading #140440

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d1aaf9a
Optimize PySet_Add for uniquely referenced sets in free-threading
yoney Oct 21, 2025
37ac4ce
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yoney Oct 22, 2025
48a4017
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yoney Oct 22, 2025
0932e16
Only for frozenset
yoney Oct 23, 2025
68ecfe5
Fix the condition
yoney Oct 23, 2025
c22066f
Merge branch 'main' into ft_set_frozenset
kumaraditya303 Nov 2, 2025
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Fix the condition
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@yoney
yoney committed Oct 23, 2025
commit 68ecfe52617d8ff43d46e8b84e9b82fda85b8c1e
2 changes: 1 addition & 1 deletion Objects/setobject.c
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Expand Up @@ -2781,7 +2781,7 @@ PySet_Add(PyObject *anyset, PyObject *key)
return rv;
}

if (PyFrozenSet_Check(anyset) || _PyObject_IsUniquelyReferenced(anyset)) {
if (PyFrozenSet_Check(anyset) && _PyObject_IsUniquelyReferenced(anyset)) {
// We can only change frozensets if they are uniquely referenced. The
// API limits the usage of `PySet_Add` to "fill in the values of brand
// new frozensets before they are exposed to other code". In this case,
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