Scott David Daniels wrote:

   comparisons.  Using hashes, three file reads and three comparisons
   of hash values.  Without hashes, six file reads; you must read both
   files to do a file comparison, so three comparisons is six files.

That's provided you compare always 2 files at a time. I compare n files at a time, n being the number of files of the same size. That's quicker than hashes because I have a fair chance of finding a difference before the end of files. Otherwise, it's like hashes without computation and without having to have a second go to *really* compare them.


-pu
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