<?
    $array = array(
        'a' => 'b',
        'c' => 'd',
        'e' => array(
            'f' => 'g',
            'h' => 'i'
        ),
        'j' => 'k'
    );
    $nonArray = "Min mamma i skogen";
    $time1=microtime(true);
    for($i=0;$i<10000000;$i++) {
        $bool = (array)$array === $array;
        $bool = (array)$nonArray === $nonArray;
    }
    $time2=microtime(true);
    $diff = $time2-$time1;
    echo "(array)===: $diff\n";

    $time1=microtime(true);
    for($i=0;$i<10000000;$i++) {
        $bool = (array)$array == $array;
        $bool = (array)$nonArray == $nonArray;
    }
    $time2=microtime(true);
    $diff = $time2-$time1;
    echo "(array)==: $diff\n";


        $time1=microtime(true);
        for($i=0;$i<10000000;$i++) {
                $bool = is_array($array);
                $bool = is_array($nonArray);
        }
        $time2=microtime(true);
        $diff = $time2-$time1;
        echo "is_array: $diff\n";



?>