s/iter tr_via_readline 10k tr_via_readline 100k tr_via_readline 1m tr_map_file tr_in_memory
tr_via_readline 10k    4.61                  --                 -15%          -17%        -65%         -77%
tr_via_readline 100k   3.91                 18%                   --           -2%        -59%         -72%
tr_via_readline 1m     3.83                 20%                   2%            --        -58%         -72%
tr_map_file            1.60                189%                 145%          140%          --         -32%
tr_in_memory           1.08                327%                 262%          255%         48%           --