note 45465 added to function.mt-rand
| From: | JulienCROUZETjucrouzet_at_cpan dot org at osu1 dot php dot net | Date: | Wed, 08 Sep 2004 11:08:38 +0000 |
| Subject: | note 45465 added to function.mt-rand | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-76219@lists.php.net to get a copy of this message | ||
mt_rand is a better random method,
BUT
mt_rand() is NOT four time faster than rand()
$> time echo "<?php \$i = 1000000; while(\$i--) { rand(0,10); } ?>" | php
php 1.68s user 0.01s system 99% cpu 1.693 total
$> time echo "<?php \$i = 1000000; while(\$i--) { mt_rand(0,10); } ?>" | php
php 1.69s user 0.02s system 100% cpu 1.708 total
time echo "<?php \$i = 1000000; while(\$i--) { rand(0,100000); } ?>"
php 1.71s user 0.00s system 99% cpu 1.713 total
time echo "<?php \$i = 1000000; while(\$i--) { mt_rand(0,100000); } ?>" | php
php 1.72s user 0.02s system 100% cpu 1.726 total
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Manual Page -- http://www.php.net/manual/en/function.mt-rand.php
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