$ perl5.14.4 foo
                       Rate end_of_substring end_slurped tr_and_end   all tr_and_match while split tr_and_split_redux tr_and_split tr_moar_magic   tr
end_of_substring     2672/s               --        -19%       -19%  -22%         -38%  -59%  -78%               -95%         -96%          -96% -97%
end_slurped          3298/s              23%          --        -0%   -3%         -23%  -49%  -73%               -94%         -95%          -95% -97%
tr_and_end           3312/s              24%          0%         --   -3%         -23%  -49%  -73%               -94%         -95%          -95% -97%
all                  3406/s              27%          3%         3%    --         -20%  -47%  -72%               -93%         -94%          -94% -97%
tr_and_match         4277/s              60%         30%        29%   26%           --  -34%  -65%               -92%         -93%          -93% -96%
while                6443/s             141%         95%        95%   89%          51%    --  -47%               -88%         -89%          -89% -94%
split               12255/s             359%        272%       270%  260%         187%   90%    --               -77%         -80%          -80% -88%
tr_and_split_redux  52356/s            1859%       1487%      1481% 1437%        1124%  713%  327%                 --         -14%          -15% -48%
tr_and_split        60606/s            2168%       1738%      1730% 1679%        1317%  841%  395%                16%           --           -1% -40%
tr_moar_magic       61350/s            2196%       1760%      1752% 1701%        1334%  852%  401%                17%           1%            -- -39%
tr                 101010/s            3680%       2963%      2949% 2866%        2262% 1468%  724%                93%          67%           65%   --