100 lines/100 iterations:
          Rate bitwise  ifchop
bitwise 33.1/s      --    -41%
ifchop  56.5/s     71%      --

10 lines/10000 iterations:
          Rate bitwise  ifchop
bitwise 3226/s      --    -57%
ifchop  7463/s    131%      --

1000 lines/5 iterations:
        s/iter bitwise  ifchop
bitwise   3.06      --    -23%
ifchop    2.37     29%      --