On one of my machines: 

1..4
ok 1 - array
ok 2 - substr
ok 3 - pack
ok 4 - regex
               Rate  arraywise  regexwise   packwise    bitwise substr
+wise
arraywise    38.9/s         --       -75%       -86%       -98%      -
+100%
regexwise     153/s       294%         --       -43%       -93%      -
+100%
packwise      270/s       593%        76%         --       -87%      -
+100%
bitwise      2077/s      5239%      1255%       671%         --       
+-99%
substrwise 187563/s    481985%    122274%     69480%      8930%       
+  --

[download]
I guessed that my solution is as slow as I am... ;-)

McA

In reply to Re^3: using bits to print part of a string by McA
in thread using bits to print part of a string by Anonymous Monk

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