Online PHP editor | output for 4vGK2

<?php $benchFx = function (string $msg, \Closure $fx) { $times = []; for ($i = 0; $i < 100; $i++) { $t = microtime(true); $fx(); $t = microtime(true) - $t; $times[] = $t; } $bestTime = min($times); echo $msg . ': ' . round($bestTime * 1000, 2) . " ms\n"; }; $benchFx('array_shift', function () { $arr = range(1, 2_000); while (array_shift($arr)); }); $benchFx('array_pop', function () { $arr = range(1, 2_000); while (array_pop($arr)); });