On Jun 18, 2013, at 1:01 PM, Skip Montanaro wrote: >> I don't understand why the first way is so much slower. > > I have no obvious answers, but a couple suggestions: > > 1. Can you anchor the pattern at the beginning of the line? (use > match() instead of search())
That's one of the things we tried. Didn't make any difference. > 2. Does it get faster it you eliminate the "(.*)" part of the pattern? Just tried that, it also didn't make any difference. > It seems that if you find a line matching the first part of the > pattern, you could just as easily split the line yourself instead of > creating a group. At this point, I'm not so much interested in making this faster as understanding why it's so slow. I'm tempted to open this up as a performance bug against the regex module (which I assume will be rejected, at least for the 2.x series). --- Roy Smith r...@panix.com -- http://mail.python.org/mailman/listinfo/python-list
