soon in PHP 7

gistfile1.php

<?php

// really really fast loop (0.008s)

$arr = range(1, pow(2, 24)+1);

for ($i = 1; $i < 200000; $i++) {
	unset($arr[$i]);
	$arr[] = 1;
}


// really really slow loop (0.38s)

$arr = range(1, pow(2, 24)-1);

for ($i = 1; $i < 200000; $i++) {
	unset($arr[$i]);
	$arr[] = 1;
}