Hi again ;-)

In the first block I'd replace 

$record->[1] = join ("_", $Map{$record->[1]}[1], $Map{$record->[1]}[0]
+);

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with 
$record->[1] = $Map{$record->[1]}[1] . '_' . $Map{$record->[1]}[1];

[download]

In the second block I'd avoid the iteration by using join: 

    print DATA join(" ", @$record[0..4]), "\n";

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rather than 
    for my $i (0 .. 4) {
        print DATA $record->[$i] . " ";
    }
    print DATA "\n";

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or even 
print DATA join(" ", @$_[0..4]), "\n" for (@Data);

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that does the whole block in one line.

You can find the code I used to do the benchmarks on my scrachpad.

Hope this helps, -gjb-

In reply to Re: advice on improving performance of this code by gjb
in thread advice on improving performance of this code by Anonymous Monk

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