$ perl5.12.5 foo
                      Rate end_of_substring end_slurped tr_and_end   all while split tr_and_split_redux tr_and_split tr_moar_magic
end_of_substring    2596/s               --        -18%       -19%  -21%  -61%  -77%               -95%         -96%          -96%
end_slurped         3185/s              23%          --        -1%   -3%  -52%  -72%               -94%         -95%          -95%
tr_and_end          3214/s              24%          1%         --   -2%  -52%  -72%               -94%         -95%          -95%
all                 3270/s              26%          3%         2%    --  -51%  -71%               -94%         -95%          -95%
while               6693/s             158%        110%       108%  105%    --  -41%               -87%         -89%          -89%
split              11429/s             340%        259%       256%  249%   71%    --               -78%         -81%          -82%
tr_and_split_redux 52910/s            1938%       1561%      1546% 1518%  690%  363%                 --         -12%          -15%
tr_and_split       60241/s            2220%       1792%      1774% 1742%  800%  427%                14%           --           -3%
tr_moar_magic      62112/s            2293%       1850%      1832% 1799%  828%  443%                17%           3%            --