v5.42.0 / MSWin32-x64-multi-thread / 13.2.0

String length: 1,000
              Rate c_better      c2f        f
c_better  829929/s       --      -8%     -17%
c2f       905443/s       9%       --     -10%
f        1003704/s      21%      11%       --

String length: 10,000
             Rate c_better      c2f        f
c_better  94179/s       --     -11%     -22%
c2f      105326/s      12%       --     -13%
f        120618/s      28%      15%       --

String length: 100,000
            Rate c_better      c2f        f
c_better  9683/s       --     -12%     -22%
c2f      10983/s      13%       --     -12%
f        12418/s      28%      13%       --

String length: 1,000,000
           Rate c_better      c2f        f
c_better  969/s       --     -10%     -22%
c2f      1082/s      12%       --     -13%
f        1246/s      28%      15%       --

String length: 10,000,000
           Rate c_better      c2f        f
c_better 95.1/s       --      -9%     -20%
c2f       104/s      10%       --     -12%
f         119/s      25%      14%       --

String length: 100,000,000
           Rate c_better      c2f        f
c_better 9.55/s       --      -9%     -18%
c2f      10.5/s      10%       --     -10%
f        11.6/s      22%      11%       --