Get rid of array_unshift whereever possible

[david]

$t = microtime(true);

$arr = array();
for($i = 0; $i < 1000; $i++) {
   $arr[] = $i;
   //array_unshift($arr, $i);
}

$arr = array_reverse($arr);

echo (microtime(true) - $t);

This takes 3ms, the array_unshift (without array_reverse then of course) takes 300ms. Maybe array_shift is equally slow.