$time php bubble.php real 0m2.076s user 0m1.736s sys 0m0.052s $time php bubble.php real 0m1.8100s user 0m1.680s sys 0m0.044s $time php bubble.php real 0m1.935s user 0m1.672s sys 0m0.052s $time php bubble.php real 0m1.861s user 0m1.676s sys 0m0.040s $time php bubble.php real 0m2.076s user 0m1.708s sys 0m0.064s $time php bubble.php real 0m1.850s user 0m1.640s sys 0m0.060s $time php bubble.php real 0m1.872s user 0m1.664s sys 0m0.060s $