usleep.php

<?php
$sleep_time = 0;
$loop = 1000;
if (preg_match('/^(\d+)s$/', $argv[1])) {
    $sleep_time = (int)$argv[1];
}
$usleep_time = (isset($argv[1]) && $argv[1] > 0) ? (int)$argv[1] : 1000;

if ($sleep_time > 0) {
    printf("sleep%d\n", $sleep_time);
    for ($i = 0; $i < $loop; $i++) {
        $ts1 = gettimeofday();
        sleep($sleep_time);
        $ts2 = gettimeofday();
        $delta = ($ts2['sec']-$ts1['sec'])*1000000+($ts2['usec']-$ts1['usec']);
        echo $delta, "\n";
    }
} else {
    printf("usleep%d\n", $usleep_time);
    for ($i = 0; $i < $loop; $i++) {
        $ts1 = gettimeofday();
        usleep($usleep_time);
        $ts2 = gettimeofday();
        $delta = ($ts2['sec']-$ts1['sec'])*1000000+($ts2['usec']-$ts1['usec']);
        echo $delta, "\n";
    }
}