speedTest.php

<?php
function fun() {return (3.75*0.12345*12345*9.999);};

function test() {
	$start = microtime(true);
	$s = 'php';
	for ($i = 0; $i < call_user_func('fun'); $i += (0.5 + 0.5)) {
		$s = preg_replace('#[02468]#', 'X', sha1(md5($s)));
	}
	return microtime(true) - $start;
}

$total = 0;
$it = 10;
for ($i = 0; $i < $it; $i++) {
	$total += test();
	sleep(1);
}
printf('Average time of %d iterations: %f seconds.', $it, $total/$it);