On 3 Oct 2013 06:00, "Victor Stinner" <victor.stin...@gmail.com> wrote: > > I don't remember where, but I remember that I also saw things like > "str=str, len=len, ...". So you keep the same name, but you use fast > local lookups instead of slow builtin lookups.
functools uses the local binding trick in lru_cache as a speed hack (pretty sure it uses an underscore prefix, though). However lru_cache *is* likely to end up being speed critical *and* it's binding local variables , so it's actually shifting a lot more work to compile time than merely trading a builtin lookup for a global lookup does. For most code though, introducing that kind of complexity isn't worth the cost in readability. Cheers, Nick. > > Victor > > 2013/10/2 Antoine Pitrou <solip...@pitrou.net>: > > On Wed, 2 Oct 2013 18:16:48 +0200 (CEST) > > serhiy.storchaka <python-check...@python.org> wrote: > >> http://hg.python.org/cpython/rev/d48ac94e365f > >> changeset: 85931:d48ac94e365f > >> user: Serhiy Storchaka <storch...@gmail.com> > >> date: Wed Oct 02 19:15:54 2013 +0300 > >> summary: > >> Use cached builtins. > > > > What's the point? I don't think it's a good idea to uglify the code if > > there isn't a clear benefit. > > > > Regards > > > > Antoine. > > > > > > _______________________________________________ > > Python-Dev mailing list > > Python-Dev@python.org > > https://mail.python.org/mailman/listinfo/python-dev > > Unsubscribe: https://mail.python.org/mailman/options/python-dev/victor.stinner%40gmail.com > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > https://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: https://mail.python.org/mailman/options/python-dev/ncoghlan%40gmail.com
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