[issue2303] isinstance is 4x as slow as in 2.5 because the common case raises

[Thomas Heller]

Thomas Heller <theller at ctypes.org> added the comment:

Issue #2534 has a patch which speeds up isinstance and issubclass by
implementing type.__instancecheck__ and type.__subclasscheck__.

__________________________________
Tracker <report at bugs.python.org>
<http://bugs.python.org/issue2303>
__________________________________