In the first snippet, you should move the print into the loop to avoid using gigabytes of memory. That seemed to be the point of the OP's buffering. 
$/ = \8; # Read 8-byte records. Behind the scenes, Perl will do buffer
+ing of reads.
print OUTFILE blowfishify($_)
   while <INFILE>;

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In reply to Re^4: Fast parsing for cypher block chaining by ikegami
in thread Fast parsing for cypher block chaining by fluffyvoidwarrior

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