> ./array_fast_test.pl
Usage: ./array_fast_test.pl length [-count]
> ./array_fast_test.pl 100 -10
            Rate Version 2 Version 3 Version 1
Version 2 8548/s        --       -1%      -13%
Version 3 8599/s        1%        --      -12%
Version 1 9780/s       14%       14%        --
> ./array_fast_test.pl 1000 -10
           Rate Version 3 Version 2 Version 1
Version 3 867/s        --       -0%      -13%
Version 2 868/s        0%        --      -13%
Version 1 995/s       15%       15%        --
> ./array_fast_test.pl 10000 -10
            Rate Version 2 Version 3 Version 1
Version 2 53.3/s        --       -0%      -15%
Version 3 53.4/s        0%        --      -15%
Version 1 63.0/s       18%       18%        --
> ./array_fast_test.pl 100000 -10
            Rate Version 2 Version 3 Version 1
Version 2 5.05/s        --       -0%      -20%
Version 3 5.06/s        0%        --      -20%
Version 1 6.34/s       25%       25%        --
> ./array_fast_test.pl 1000000 -10
          s/iter Version 2 Version 3 Version 1
Version 2   2.05        --       -1%      -20%
Version 3   2.03        1%        --      -19%
Version 1   1.64       25%       24%        --