Speed PHP benchmark

speed.php

<?php

$len = 1000000;

$a = range(1, $len);
$f = SplFixedArray::fromArray($a);

$s = microtime(1);

$i = $len;
while (--$i) {
    #1

    $b = $a[$i];
}

echo 1000*(microtime(1)-$s), "\n";
$s = microtime(1);

$proto = array('r'=>4);

$i = $len;
while (--$i) {
    #2
 
    $b = $f[$i];
}

echo 1000*(microtime(1)-$s), "\n";