On Aug 8, 7:18 pm, "David C. Ullrich" <dullr... at sprynet.com> wrote: > The one thing that puzzles me about > all the results is why // is so much slower than / inside > that Psyco loop. Just an oversight. The optimization about '/' between integers was not copied for the case of '//' between integers. Fixed in the svn head :-) Armin