13 Apr
2006
13 Apr
'06
9:54 a.m.
* not real confident of the numbers .... seem reasonable but ...
That's roughly what I'd expect: Regex and xpressive use very similar algorithms internally, with Eric and I occationally playing a game of leapfrog :-) And probably we've both already grabbed the low hanging fruit, unless Eric has any cunning plans he's keeping to himself :-) Performance between the two depends upon the exact expression used, and the data searched, but they probably should be within a factor of 2 of each other. Historically Regex tended to do better with sparse matches in big files, and xpressive better with short dense matches, but I haven't tested a really recent version of xpressive, so as ever your mileage may vary. John.