From: Kumar Aditya <kumaraditya@python.org>
Date: Tue, 11 Nov 2025 14:32:32 +0000 (+0530)
Subject: gh-132657: optimize `PySet_Contains` for `frozenset` (#141183)
X-Git-Tag: v3.15.0a2~112
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7211a34fe1d9704935342af8c9b46725629f2d97;p=thirdparty%2FPython%2Fcpython.git

gh-132657: optimize `PySet_Contains` for `frozenset` (#141183)
---

diff --git a/Objects/setobject.c b/Objects/setobject.c
index 213bd821d8a1..2401176576eb 100644
--- a/Objects/setobject.c
+++ b/Objects/setobject.c
@@ -2747,7 +2747,9 @@ PySet_Contains(PyObject *anyset, PyObject *key)
         PyErr_BadInternalCall();
         return -1;
     }
-
+    if (PyFrozenSet_CheckExact(anyset)) {
+        return set_contains_key((PySetObject *)anyset, key);
+    }
     int rv;
     Py_BEGIN_CRITICAL_SECTION(anyset);
     rv = set_contains_key((PySetObject *)anyset, key);