Rate split1 substr1 map_split subst map_split_join using_str_bit_ops_and_tr
split1                   1.74/s     --    -94%     -100% -100%          -100%                 -100%
substr1                  30.5/s  1650%      --      -93%  -94%           -94%                  -96%
map_split                 455/s 26002%   1392%        --  -13%           -15%                  -34%
subst                     520/s 29765%   1607%       14%    --            -3%                  -25%
map_split_join            534/s 30577%   1653%       18%    3%             --                  -23%
using_str_bit_ops_and_tr  692/s 39604%   2169%       52%   33%            29%                    --