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

Author: AlexWaygood

Lib/typing.py

@@ -2039,7 +2039,7 @@ def __instancecheck__(cls, instance):
                     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