Re: Freelance code optimizations
| From: | Curt Zirzow | Date: | Mon, 11 Aug 2003 21:25:21 +0000 |
| Subject: | Re: Freelance code optimizations | ||
| References: | 1 2 3 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-159196@lists.php.net to get a copy of this message | ||
* Thus wrote Ray (ray.list@powerweb.net):
>
> so if $a is something like the size of an array or another thing that affects
> the number of times the loop needs to be run. then if you can, reverse the
> order of the loop so you can compare to 0 (or another constant)
>
> <?php
> $a = 10000000;
> $i = $a;
> while( $i-- > 0 ){}
> ?>
> real 0m7.111s
> user 0m6.870s
> sys 0m0.040s
Interesting approach... yet:
My results for above
31.017u 0.007s 0:31.14 99.5% 1544+918k 0+0io 0pf+0w
You can optimize it some more:
<?php
$a = 10000000;
$i = $a;
while( $i-- ){}
?>
these results
19.008u 0.031s 0:19.58 97.1% 1544+918k 0+0io 0pf+0w
Curt
--
"I used to think I was indecisive, but now I'm not so sure."