Use Digest::MD5's addfile() method to determine the digests of each file and then compare the two. Alternatively, calculate a fast but less reliable System V checksum, like described in unpack: 
                   $checksum = do {
                       local $/;  # slurp!
                       unpack("%32C*",<>) % 65535;
                   };

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In reply to Re: Binary diff in Perl by saintmike
in thread Binary diff in Perl by cool_ravi2

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