Teste de tempo de hash de senhas em php

php_benchmark.php

<?php

$n_pass = 200000;
$n_iter = 2;

function generate() {
	return uniqid(rand(), TRUE);
}

$total_time_ini = microtime(true);

$list = array();
$i=$n_pass;
while($i--){
	$list[generate()] = generate();
}

$result = array();
foreach (hash_algos() as $algo) {
	$time_ini = microtime(true);
	foreach ($list as $salt => $pass) {
		$i=$n_iter;
		while($i--){
			hash($algo, $salt . $pass);
		}
	}
	$time_end = microtime(true);

	$result[$algo] = ($time_end - $time_ini);
	echo $algo .' = '. $result[$algo] . PHP_EOL;
}

for($strong=4;$strong<=31;$strong++) {
	$algo = 'bcrypt-'.$strong;
	$time_ini = microtime(true);
	foreach ($list as $salt => $pass) {
		$i=$n_iter;
		while($i--){
			/* Método = 2a = bcrypt/blowfish
			 * Custo  = 4 a 31
			*/
			crypt($pass, '$2a$' . $strong . '$' . $salt . '$');
		}
	}
	$time_end = microtime(true);

	$result[$algo] = ($time_end - $time_ini);
	echo $algo .' = '. $result[$algo] . PHP_EOL;
}

echo PHP_EOL;
asort($result);
print_r($result);
echo PHP_EOL;
echo 'Total time: '.(microtime(true) - $total_time_ini);
echo PHP_EOL;