References rock

ReferencesRock

<?php


$numbers = [];

define('size', 10000);

for ($i=0 ; $i<size; $i++) {
    $numbers[] = $i;
}

if (false) {
    echo "Immutability sucks sometimes\n";
    function process($i, array $numbers)
    {
        $index = rand(0, size - 1);
        $tmp = $numbers[$index];
        $numbers[$index] = $numbers[$i];

        $numbers[$i] = $tmp;

        return $numbers;
    }

    for ($i = 0; $i < size; $i++) {
        $numbers = process($i, $numbers);
    }

}
else {
    echo "References rock sometimes\n";
    function process($i, array &$numbers)
    {
        $index = rand(0, size - 1);
        $tmp = $numbers[$index];
        $numbers[$index] = $numbers[$i];

        $numbers[$i] = $tmp;
    }

    for ($i = 0; $i < size; $i++) {
        process($i, $numbers);
    }
}