Re: Performance: While or For loop

On Sat, 2007-03-24 at 01:54 +0100, Tijnema ! wrote: > On 3/24/07, Richard Lynch <ceo@l-i-e.com> wrote: > > On Thu, March 22, 2007 5:14 pm, Tijnema ! wrote: > > > On 3/22/07, Jon Anderson <janderson@gamingsolutions.ca> wrote: > > >> Your test isn't exactly fair. The for loop has no statements in it, > > >> and > > >> the while loop has one. Your tests show while as approx 7% faster, > > >> while > > >> a modified test shows an approximate 30% speed improvement: > > >> > > >> Do this: > > >> > > >> for ($i=0;$i<10000000;$i++) {} > > >> > > >> v.s.: > > >> > > >> $i = 0; > > >> while ($i++ < 10000000) {} > > >> > > >> The above while loop is 30% faster than the for. A little teaking on > > >> the > > >> for loop, it's faster still: > > > > Folks: > > > > How often do you use a loop of any kind in PHP with enough iterations > > that this is even significant? > > > > Write the code that makes sense. > > > > Optimize the biggest bottleneck until performance is acceptable. It's not optimization if you just happen to write optimal code out of habit. It's already done. Cheers, Rob. -- .------------------------------------------------------------. | InterJinn Application Framework - http://www.interjinn.com | :------------------------------------------------------------: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `------------------------------------------------------------'