Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
match Python 2.5 speed despite the __instancecheck__ / __subclasscheck__
mechanism. In the process, fix a bug where isinstance() and issubclass(),
when given a tuple of classes as second argument, were looking up
__instancecheck__ / __subclasscheck__ on the tuple rather than on each
type object.
Reviewed by Benjamin Peterson and Raymond Hettinger.
diff --git a/Include/abstract.h b/Include/abstract.h
index 46a6f54..0bbcee5 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -1273,6 +1273,11 @@
/* issubclass(object, typeorclass) */
+PyAPI_FUNC(int) _PyObject_RealIsInstance(PyObject *inst, PyObject *cls);
+
+PyAPI_FUNC(int) _PyObject_RealIsSubclass(PyObject *derived, PyObject *cls);
+
+
#ifdef __cplusplus
}
#endif