Thanks for pointing that out! I knew something was wrong with those numbers, but for the life of me, couldn't figure out what. Tossing in a print statement to check the return value obviously didn't help things :-)

Regarding my sort routine, if you run my updated version (your scores look like the original) on a Perl 5.6.1, you should find that it's the fastest until about 10,000 elements, at which point arhuman's begins to take the lead: 

Comparing for 1000 elements
      Rate  myo   st  tye   ah   mc
myo 18.4/s   -- -61% -72% -78% -83%
st  46.9/s 154%   -- -29% -43% -58%
tye 66.5/s 261%  42%   -- -20% -40%
ah  82.7/s 348%  76%  24%   -- -25%
mc   111/s 500% 136%  66%  34%   --

Comparing for 2500 elements
      Rate  myo   st  tye   ah   mc
myo 7.46/s   -- -54% -69% -76% -78%
st  16.3/s 118%   -- -32% -47% -51%
tye 24.0/s 222%  48%   -- -22% -28%
ah  31.0/s 315%  90%  29%   --  -8%
mc  33.5/s 349% 106%  39%   8%   --

Comparing for 10000 elements
      Rate  myo   st  tye   mc   ah
myo 1.36/s   -- -53% -68% -76% -78%
st  2.88/s 112%   -- -33% -49% -55%
tye 4.29/s 214%  49%   -- -25% -32%
mc  5.69/s 317%  97%  33%   -- -10%
ah  6.34/s 365% 120%  48%  12%   --

[download]
Perl 5.6 gives rather different results though... 
   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

In reply to Re: (tye)Re3: Substring Sort by MeowChow
in thread Substring Sort by Anonymous Monk

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