docker-pdns-server/poweradmin/poweradmin-2.1.8/inc/benchmark.php

<?php

/**
 * Benchmarking functions
 *
 * @package Poweradmin
 * @copyright   2007-2010 Rejo Zenger <rejo@zenger.nl>
 * @copyright   2010-2017  Poweradmin Development Team
 * @license     http://opensource.org/licenses/GPL-3.0 GPL
 */
$start_memory = memory_get_usage();
$start_time = microtime(true);

/** Get Human Readable Size
 *
 * Convert size to human readable units
 *
 * @param int $size Size to convert
 *
 * @return string $result Human readable size
 */
function get_human_readable_usage($size) {
    $units = array('B', 'KB', 'MB', 'GB');
    $result = $size . ' B';

    if ($size < 1024)
        return $result;

    $index = (int)floor(log($size, 1024));
    if ($index < sizeof($units)) {
        $result = round($size / pow(1024, ($index)), 2) . ' ' . $units[$index];
    }

    return $result;
}

/** Print Current Memory and Runtime Stats
 */
function display_current_stats() {
    global $start_time, $start_memory;
    $memory_usage = get_human_readable_usage(memory_get_usage() - $start_memory);
    $elapsed_time = sprintf("%.5f", microtime(true) - $start_time);
    echo "Memory usage: " . $memory_usage . ", elapsed time: " . $elapsed_time;
}