Hello Monks,

i need to duplicate check arrays , array size is from 5 million till 1 billion elements.
i use the following code

if ($file =~ $spec_text){
        my $file_date = (split(/\./,$file))[3];
        open(IN, '<', $file) or die("open failed: $!");
        my @rows;
        while (<IN>) {
            chomp;
            my @eles = split(";",$_);
            push @rows,$eles[0].";".$eles[1].";".$file_date;
        }
        print scalar(@rows),"\n";
        my @non_dupe_rows = do { my %seen;grep !$seen{$_}++, @rows };
        print scalar(@non_dupe_rows),"\n";
    }

[download]

this code need for 9 million elements 203 seconds on our server, but i need it faster, i need to parse in total approx 15 billion elements ( from all files).
idears how do speed it up are greatly welcome

kd ultibuzz

In reply to how to speed up dupe checking of arrays by ultibuzz

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