# my @arr = (0,3,4,5,8,10,12,15, 1..999999);

          Rate mapgrep   slice    push     map    grep
mapgrep 2.02/s      --    -29%    -35%    -38%    -40%
slice   2.84/s     40%      --     -9%    -13%    -16%
push    3.11/s     54%      9%      --     -5%     -8%
map     3.27/s     62%     15%      5%      --     -3%
grep    3.37/s     66%     18%      8%      3%      --

# my @arr = (0,3,4,5,8,10,12,15);

            Rate    push mapgrep   slice     map    grep
push    160309/s      --    -30%    -39%    -50%    -54%
mapgrep 229948/s     43%      --    -12%    -28%    -34%
slice   261705/s     63%     14%      --    -18%    -25%
map     319334/s     99%     39%     22%      --     -9%
grep    350258/s    118%     52%     34%     10%      --