scalars.php

<?php
$start = microtime(true);

function get_cache_value() {
  return rand(0, 100).'test';
}

$results = array();
for ($i=0; $i<1000; $i++) {
	$results[] = get_cache_value();
}

printf("Done in: %f s\n", microtime(true) - $start)."\n";
printf("Memory used: %d KB\n", memory_get_peak_usage(true)/1024)."\n";

Done in: 0.002922 s
Memory used: 256 KB