$time php bubble.php real 0m7.404s user 0m7.012s sys 0m0.080s $time php bubble.php real 0m7.333s user 0m7.044s sys 0m0.068s $time php bubble.php real 0m7.393s user 0m7.068s sys 0m0.100s $time php bubble.php real 0m7.345s user 0m7.024s sys 0m0.104s $time php bubble.php real 0m7.545s user 0m7.224s sys 0m0.080s $time php bubble.php real 0m7.275s user 0m6.992s sys 0m0.072s $time php bubble.php real 0m7.340s user 0m7.044s sys 0m0.072s $