Description:
------------
When array data is int value, array_intersect() speed VERY SLOW.

Test script:
---------------
<?php

ini_set('memory_limit', -1);

$data_a = rand_data(FALSE);
$data_b = rand_data(FALSE);

$time = microtime(TRUE);

$result = array_intersect($data_a, $data_b);

$time = microtime(TRUE) - $time;

echo " -> array_intersect by intval: {$time}, result: " . count($result) . "\r\n";

$data_a = rand_data(TRUE);
$data_b = rand_data(TRUE);

$time = microtime(TRUE);

$result = array_intersect($data_a, $data_b);

$time = microtime(TRUE) - $time;

echo " -> array_intersect by string: {$time}, result: " . count($result) . "\r\n";

function rand_data($need_string)
{
    mt_srand();

    $result = array();

    for ($i = 0; $i < 300000; $i++)
    {
        if ($need_string === TRUE)
        {
            $result[] = (string)mt_rand();
        }
        else
        {
            $result[] = mt_rand();
        }
    }

    return $result;
}

?>

Expected result:
----------------
almost same?

Actual result:
--------------
 -> array_intersect by intval: 10.661009073257, result: 47
 -> array_intersect by string: 1.3067090511322, result: 41