c:\test>junk
           Rate    regex unpack_C unpack_a    split
regex    7.95/s       --      -1%     -10%     -14%
unpack_C 8.01/s       1%       --     -10%     -14%
unpack_a 8.88/s      12%      11%       --      -4%
split    9.30/s      17%      16%       5%       --

c:\test>junk
           Rate    regex unpack_C unpack_a    split
regex    7.95/s       --      -0%      -8%     -12%
unpack_C 7.95/s       0%       --      -8%     -12%
unpack_a 8.68/s       9%       9%       --      -4%
split    9.09/s      14%      14%       5%       --

c:\test>junk
           Rate unpack_C    regex unpack_a    split
unpack_C 8.02/s       --      -0%      -9%     -11%
regex    8.02/s       0%       --      -9%     -11%
unpack_a 8.81/s      10%      10%       --      -2%
split    9.02/s      13%      13%       2%       --

c:\test>junk
           Rate unpack_C    regex unpack_a    split
unpack_C 7.95/s       --      -0%      -9%     -13%
regex    7.95/s       0%       --      -9%     -13%
unpack_a 8.74/s      10%      10%       --      -5%
split    9.16/s      15%      15%       5%       --