v0.8.1
https://github.com/python/cpython
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.
- HEAD
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Issue #2534: speed up isinstance() and issubclass() by 50-70%, so as to
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