c:\test>\perl32\bin\perl junk.pl
           Rate unpack_C    split    regex unpack_a
unpack_C 8.38/s       --      -5%      -9%     -15%
split    8.81/s       5%       --      -5%     -11%
regex    9.23/s      10%       5%       --      -6%
unpack_a 9.86/s      18%      12%       7%       --

c:\test>\perl32\bin\perl junk.pl
           Rate unpack_C    split    regex unpack_a
unpack_C 8.45/s       --      -5%      -8%     -15%
split    8.87/s       5%       --      -3%     -11%
regex    9.16/s       8%       3%       --      -8%
unpack_a 9.94/s      18%      12%       9%       --

c:\test>\perl32\bin\perl junk.pl
           Rate unpack_C    split    regex unpack_a
unpack_C 8.38/s       --      -5%      -8%     -14%
split    8.81/s       5%       --      -4%     -10%
regex    9.16/s       9%       4%       --      -6%
unpack_a 9.78/s      17%      11%       7%       --

c:\test>\perl32\bin\perl junk.pl
           Rate unpack_C    split    regex unpack_a
unpack_C 8.38/s       --      -5%      -8%     -14%
split    8.81/s       5%       --      -4%     -10%
regex    9.16/s       9%       4%       --      -6%
unpack_a 9.78/s      17%      11%       7%       --