On Mon, 09 Sep 2013 09:05:57 -0700 Ethan Furman <et...@stoneleaf.us> wrote: > On 09/09/2013 08:43 AM, Mark Shannon wrote: > > I would like time to investigate this further, but at the moment I think it > > will either make attribute lookup poorly > > defined or slow. > > > > Of the top of my head, the problem as a I see it is basically this: > > Currently, type.__getattribute__() is a fixed point in the lookup of > > attributes. > > The proposal means that a fixed point is not reached until the cls > > parameter of type.__getattribute__() is either object > > or type, > > otherwise type.__getattribute__() and type.__locallookup__ must bounce back > > and forth. > > > > This will slow down *every* attribute lookup for what is a fairly obscure > > use case. > > Looks like there's a patch we can try at http://bugs.python.org/issue18181. > > Here are Ronald's last timings:
Thanks but can you run a benchmark that actually exercises the feature? (I don't know enough about it to know what that would be, but I suppose it has to do with lookups on classes, rather than on instances) 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/archive%40mail-archive.com
