Rate         OP while_shift     regex      ike2 chromatic      ike1
OP          245/s         --        -17%      -28%      -38%      -48%      -50%
while_shift 297/s        21%          --      -13%      -26%      -36%      -39%
regex       340/s        39%         15%        --      -15%      -27%      -31%
ike2        398/s        63%         34%       17%        --      -15%      -19%
chromatic   467/s        91%         57%       37%       17%        --       -5%
ike1        490/s       100%         65%       44%       23%        5%        --