$ perl5.18.4 foo
                       Rate end_of_substring tr_and_end end_slurped   all tr_and_match while split tr_and_split_redux tr_moar_magic tr_and_split   tr
end_of_substring     2651/s               --       -13%        -15%  -16%         -35%  -49%  -77%               -95%          -95%         -95% -98%
tr_and_end           3049/s              15%         --         -3%   -4%         -25%  -42%  -74%               -94%          -95%         -95% -97%
end_slurped          3131/s              18%         3%          --   -1%         -23%  -40%  -73%               -94%          -95%         -95% -97%
all                  3168/s              19%         4%          1%    --         -22%  -40%  -73%               -94%          -95%         -95% -97%
tr_and_match         4060/s              53%        33%         30%   28%           --  -23%  -65%               -92%          -93%         -93% -96%
while                5244/s              98%        72%         67%   66%          29%    --  -55%               -90%          -91%         -91% -95%
split               11710/s             342%       284%        274%  270%         188%  123%    --               -77%          -80%         -80% -89%
tr_and_split_redux  51020/s            1824%      1573%       1530% 1511%        1157%  873%  336%                 --          -13%         -13% -53%
tr_moar_magic       58480/s            2106%      1818%       1768% 1746%        1340% 1015%  399%                15%            --          -1% -46%
tr_and_split        58824/s            2119%      1829%       1779% 1757%        1349% 1022%  402%                15%            1%           -- -45%
tr                 107527/s            3956%      3427%       3334% 3295%        2548% 1951%  818%               111%           84%          83%   --