stackoverflow 49354241

<?php

$arr = array();

for ($i = 0; $i < 99999999; $i++)
        $arr[] = $i;

echo count($arr) . " elements generated.\n";

$waste = 0;
$t = microtime(true);
$v = 12345678;
for ($i = 0; $i < 100000; $i++)
        $waste = $arr[(int)$v];
echo sprintf('%.7f', microtime(true) - $t) . "s\n";

$t = microtime(true);
for ($i = 0; $i < 100000; $i++)
$waste = $arr[12345678];
echo sprintf('%.7f', microtime(true) - $t) . "s\n";