Marco Sulla <launchpad....@marco.sulla.e4ward.com> added the comment:
Since probably Monica are taking her holidays, I try to decipher her answer. Probably, the more problematic function spotted by Monica is update_one_slot. I re-quote her sentence: update_one_slot looks for the parent implementation by trying to find the generated wrapper methods through an MRO search. dict doesn't have generated wrappers for sq_contains and mp_subscript, because it provides explicit __contains__ and __getitem__ implementations. Instead of inheriting sq_contains and mp_subscript, update_one_slot ends up giving the subclass sq_contains and mp_subscript implementations that perform an MRO search for __contains__ and __getitem__ and call those. This is much less efficient than inheriting the C slots directly. The solution for Monica is to change the behaviour of update_one_slot for these cases (no wrappers, C slots directly). I don't know the implications of this change... ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue44921> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
