measure php code

measue-php-code.php

<?php
$start   = microtime(true);
$cycles  = 0;
$elapsed = 0;

do {
    $loops = 1000;
    $begin = microtime(true);
    do {
        // Тестируемая операция
        $arr = range(0,5);
        shuffle($arr);
    } while (--$loops);
    $cycles  += 1000;
    $elapsed += microtime(true) - $begin;
} while (microtime(true) - $start < 1);

printf("%s: %.0f cycle/sec, %s bytes, %s bytes/cycle\n", PHP_VERSION, $cycles / $elapsed, strlen($result), strlen($result) / $cycles);