On Fri, 21 Oct 2011 08:24:44 +0200 Stefan Behnel <stefan...@behnel.de> wrote: > Antoine Pitrou, 20.10.2011 23:08: > >> I have been doing some performance experiments with memcmp, and I was > >> surprised that memcmp wasn't faster than it was in Python. I did a whole, > >> long analysis and came up with some very simple results. > > > > Thanks for the analysis. Non-bugfix work now happens on Python 3, where > > the str type is Python 2's unicode type. Your recommendations would > > have to be revisited under that light. > > Well, Py3 is quite a bit different now that PEP393 is in. It appears to use > memcmp() or strcmp() a lot less than before, but I think unicode_compare() > should actually receive an optimisation to use a fast memcmp() if both > string kinds are equal, at least when their character unit size is less > than 4 (i.e. especially for ASCII strings). Funny enough, tailmatch() has > such an optimisation.
Yes, unicode_compare() probably deserves optimizing. Patches welcome, by the way :) Regards Antoine. _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
