I note the line:
next if ($hostid ne $SERVER{$server});
Why not split @DATAinto lots of $hostid.
Try:
my %new_data = ();
foreach ( @DATA ) {
my ($hostid, $rest) = split /\t/, $_, 2;
push @{$new_data{$hostid}}, "$hostid\t$rest";
}
Then instead of running through @DATA for each $hostid you can just run through @{$new_data{$hostid}} once you have determined $hostid
--tidiness is the memory loss of environmental mnemonics
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