# with a short string
regex it  520833/s       --     -56%     -88%
split it 1176471/s     126%       --     -73%
index it 4347826/s     735%     270%       --

# with a long string
              Rate regex it split it index it
regex it   20053/s       --     -68%    -100%
split it   62004/s     209%       --     -99%
index it 4784689/s   23761%    7617%       --