Benchmark

<?php
$nb_occur=3000000;

$time_start = microtime(true);

for ($i=0 ; $i<$nb_occur; $i++)
{
    //le test
}

$time_end = microtime(true);
$time = $time_end - $time_start;

echo 'Durée : '.$time.' secondes<br/>';
?>