[issue8425] a -= b should be fast if a is a small set and b is a large set

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Sorry, I was wrong.

I think that the proposed changes should be applied in set_difference_update_internal() directly.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8425>
_______________________________________