GUID generation benchmark

guid-benchmark.php

<?php

$options = getopt('i:c:');

if (!isset($options['i']) && !isset($options['c'])) {
    printf("Usage: %s -i iterations -c count\n", ltrim($argv[0], './'));
    exit(0);
}

$iterations = $options['i'];
$count = $options['c'];
$starts = array();
$ends   = array();

for ($i = 1; $i <= $iterations; ++$i) {
    $starts[$i] = microtime(true);
    printf("Iteration #%d\n", $i);
    for ($j = 1; $j <= $count; ++$j) {
        printf("\r%d/%d (%2.f%%)", $j, $count, ($j / $count * 100));
        $guid = sprintf(
            '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
            mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff),
            mt_rand(0, 0x0fff) | 0x4000,
            mt_rand(0, 0x3fff) | 0x8000,
            mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
        );
    }
    $ends[$i] = microtime(true);
    printf("\n");
}
printf("\n--------------------\n");
printf("Results: \n");
$elapsed = array();
for ($k = 1; $k <= count($ends); ++$k) {
    $elapsed[] = $ends[$k] - $starts[$k];
    printf("Iteration #%d tooks %f seconds\n", $k, end($elapsed));
}
printf("\nBest time: %f seconds\n", min($elapsed));
printf("Worst time: %f seconds\n", max($elapsed));
printf("Average time: %f seconds\n\n", array_sum($elapsed) / count($elapsed));
exit(1);