Hi All, I would admit that this code does not belong to me. one of my senior wrote this code, but it takes more time to give the output, in our production server because of the volume. 
#!/usr/bin/perl -w
use strict;
use File::Find ();

my $dir = shift;
die "Not a directory: '$dir'\n" unless -d $dir;
print "Blame for $dir\n";

my %blame = ();
my $total = 0;

my (%uid, %username, %name);
while (my ($shortname, $pw, $uid, undef, undef, undef, $name) = getpwe
+nt) {
    next if exists $username{$uid};
    $username{$uid} = $shortname;
    $name{$uid} = $name;
}

sub wanted {
        my (undef, undef, undef, undef, $uid, undef, undef, $size) = l
+stat($File::Find::name);
        $blame{$uid} += $size;
        $total += $size;
}

sub by_usage { $blame{$b} <=> $blame{$a} }

File::Find::find({wanted => \&wanted}, $dir);

print "      Usage      Login     Comment\n";
foreach my $uid (sort by_usage keys %blame) {
        next if $blame{$uid} == 0;
        printf "%13s %12s %s\n", $blame{$uid}, $username{$uid}||$uid, 
+$name{$uid}||$uid;
}
printf "%13s total disk used\n", $total;

[download]
Please let me know how can I minimize the code here to make the script run faster or give me some alternative unix commands.

In reply to would like add your enhancement by Anonymous Monk

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