$ perl5.22.0 bar
                       Rate while all split end_of_substring tr_and_match tr_and_end end_slurped tr_and_split_redux tr_moar_magic tr_and_split   tr
while              111111/s    -- -4%   -4%              -6%          -8%       -13%        -18%               -23%          -24%         -26% -26%
all                116279/s    5%  --    0%              -1%          -3%        -9%        -14%               -20%          -21%         -22% -22%
split              116279/s    5%  0%    --              -1%          -3%        -9%        -14%               -20%          -21%         -22% -22%
end_of_substring   117647/s    6%  1%    1%               --          -2%        -8%        -13%               -19%          -20%         -21% -21%
tr_and_match       120482/s    8%  4%    4%               2%           --        -6%        -11%               -17%          -18%         -19% -19%
tr_and_end         128205/s   15% 10%   10%               9%           6%         --         -5%               -12%          -13%         -14% -14%
end_slurped        135135/s   22% 16%   16%              15%          12%         5%          --                -7%           -8%          -9%  -9%
tr_and_split_redux 144928/s   30% 25%   25%              23%          20%        13%          7%                 --           -1%          -3%  -3%
tr_moar_magic      147059/s   32% 26%   26%              25%          22%        15%          9%                 1%            --          -1%  -1%
tr_and_split       149254/s   34% 28%   28%              27%          24%        16%         10%                 3%            1%           --  -0%
tr                 149254/s   34% 28%   28%              27%          24%        16%         10%                 3%            1%           0%   --