$ perl x.pl $(seq 1 1000)
              Rate    reisinge GrandFather
reisinge    3742/s          --         -3%
GrandFather 3864/s          3%          --
$ perl x.pl $(seq 1 10000)
             Rate    reisinge GrandFather
reisinge    377/s          --         -5%
GrandFather 395/s          5%          --
$ perl x.pl $(seq 1 100000)
              Rate    reisinge GrandFather
reisinge    34.1/s          --        -18%
GrandFather 41.6/s         22%          --