- microtime: documentation ( source)
- round: documentation ( source)
<?php
list($x,$y) = microtime();
$a = '';
for($i=0; $i<1000000; $i++)
$a = 'yay';
$t = microtime(true);
echo round((($n+$p)-$x-$y)*1000);
list($x,$y) = microtime();
$a = '';
for($i=0; $i<1000000; $i++)
$a = "yay";
echo round(microtime(true)-$t);