On Fri, Jun 22, 2007 at 01:32:42PM -0600, Neil Toronto wrote: > > (imap is faster in this case because the built-in name 'abs' is looked > > up only once -- in the genexp, it's looked up each time, sigh -- > > possibly the biggest "we should REALLY tweak the language to let this > > be optimized sensibly" gotcha in Python, IMHO). > > What is it about the language as it stands that requires abs() to be > looked up each iteration?
Calling abs() could change locals()['abs'], in which case a different function would be called the next time through. You lookup 'abs' each time just in case it's changed. -- Andrew McNabb http://www.mcnabbs.org/andrew/ PGP Fingerprint: 8A17 B57C 6879 1863 DE55 8012 AB4D 6098 8826 6868
signature.asc
Description: Digital signature
_______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
