Benchmark Pbkdf2 iterations with ZF2

gistfile1.php

<?php

// Benchmark the Pbkdf2 iteration (10'000 = 50 ms, using an Intel i5 CPU at 2)

use Zend\Crypt\Key\Derivation\Pbkdf2;
use Zend\Math\Rand;

$salt  = Rand::getBytes(32);
$pass  = 'this is the password of the user';
$start = microtime(true);
$hash  = Pbkdf2::calc('sha256', $pass, $salt, 10000, 32);
$end   = microtime(true);

printf ("Hash : %s\n", base64_encode($hash));
printf ("Exec. time: %.2f\n", $end-$start);