gh-74690: Further optimise `typing._ProtocolMeta.__instancecheck__` (#103280)

diff --git a/Lib/typing.py b/Lib/typing.py
index b8420f619a1d05055809aecad6a014feb44df9a4..1f1c4ffa2566ab32ba341d1babd5314c01256f71 100644 (file)
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -2039,7 +2039,7 @@ class _ProtocolMeta(ABCMeta):
                     val = getattr_static(instance, attr)
                 except AttributeError:
                     break
-                if callable(getattr(cls, attr, None)) and val is None:
+                if val is None and callable(getattr(cls, attr, None)):
                     break
             else:
                 return True