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Re: [OT]:Faster signature algorithm than md5?

by zentara (Archbishop)
on Sep 01, 2012 at 16:06 UTC ( #991169=note: print w/ replies, xml ) Need Help??


in reply to [OT]:Faster signature algorithm than md5?

For speed, you might do simple checks first, and only do an md5 check if the file size and simple crc check is identical. You can also test just the first few thousand bytes of a file, instead of running crc or md5 on the entire file.

#!/usr/bin/perl use warnings; use strict; # same as "sum -s file" use System V sum algorithm, use 512 bytes bl +ocks my $buf; open (FH,"< $0"); read( FH, $buf, -s FH ); close FH; my $checksum = unpack("%32C*",$buf) %32767; print "$checksum\n"; exit;

I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku ................... flash japh


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