If all your tasks can be identified by a simple ID, and you are running on Linux, you can "abuse" existing tools: 

$ perl generate_ids.pl | xargs -P 3 -n 1 perl process_single_id.pl

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Perl 6 - second systems done right

In reply to Re: Implement Queue mechanism in Perl by moritz
in thread Implement Queue mechanism in Perl by doubledecker

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