On Wed, 2008-06-04 at 10:18 -0600, Nathan Nobbe wrote: > On Wed, Jun 4, 2008 at 10:10 AM, Richard Heyes <richardh@xxxxxxxxxxx> wrote: > > > Hi, > > > > and the case insensitive versions are a hair faster still ;) > >> > > > > Are they? I always thought that case-sensitive functions were faster > > because they have to test fewer comparisons. Eg To test if i == I in a > > case-insensitive fashion requires two comparisons (i == I and i == i) > > whereas a case-sensitive comparison requires only one (i == i). > > > umm, isnt it like the other way around. in the case of case-sensitive, you > have to be able to distinguish between i and I, whereas w/ the case > insensitive, you dont care so, basically, you strtolower() first thing, then > just compare to lower case characters. Nope, case insensitive is slower since you must make two tests for characters having a lower and upper case version. With case sensitive comparisons you only need to make a single comparison. Cheers, Rob. -- http://www.interjinn.com Application and Templating Framework for PHP -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
