What the heck, just for fun, some minor code changes for faster execution.
caveat: not tested, not benchmarked, maybe not even syntactically correct, could cause different output :)
my $previous = "";
# skip $item variable
# 'for' just looks funny in this use
foreach (@list) {
# regex once instead of twice
# no extra work shuffling $previous back and forth until needed
if (m/^(.+)\: .+/ and $1 ne $previous) {
$previous = $1;
# take the sleep hit on the first item to save time later
# (maybe even 5 seconds worth if you have a lot of items)
sleep(5);
}
print $_;
}
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