Optimize frozendict.copy()

vstinner · vstinner · commit 6fca6d1aa2d9 · 2025-11-14T10:34:48.000+01:00
diff --git a/Objects/dictobject.c b/Objects/dictobject.c
@@ -4231,6 +4231,10 @@ PyDict_Copy(PyObject *o)
         return NULL;
     }
 
+    if (PyFrozenDict_CheckExact(o)) {
+        return Py_NewRef(o);
+    }
+
     PyObject *res;
     Py_BEGIN_CRITICAL_SECTION(o);
 

Original file line number	Diff line number	Diff line change
`@@ -4231,6 +4231,10 @@ PyDict_Copy(PyObject *o)`
`4231`	`4231`	`return NULL;`
`4232`	`4232`	`}`
`4233`	`4233`
	`4234`	`+ if (PyFrozenDict_CheckExact(o)) {`
	`4235`	`+ return Py_NewRef(o);`
	`4236`	`+ }`
	`4237`	`+`
`4234`	`4238`	`PyObject *res;`
`4235`	`4239`	`Py_BEGIN_CRITICAL_SECTION(o);`
`4236`	`4240`