Amaury Forgeot d'Arc added the comment: This slowdown is due to the new implementation of isinstance in python2.6.
If I comment most of the code of PyObject_IsInstance in Objects/abstract.c (remove all __instancecheck__ stuff; leave only the last line), timings are much better, and more similar to 2.5 performance. ---------- nosy: +amaury.forgeotdarc __________________________________ Tracker <[EMAIL PROTECTED]> <http://bugs.python.org/issue2115> __________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com