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Date: Sun, 7 Oct 2012 19:00:26 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Brandon Falk <bfalk_bsd@brandonfa.lk>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: SMP Version of tar
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> I would be willing to work on a SMP version of tar (initially just gzip or 
> something).
>
> I don't have the best experience in compression, and how to multi-thread it, 
> but I think I would be able to learn and help out.

gzip cannot - it is single stream.

bzip2 - no idea

grzip (from ports, i use it) - can be multithreaded as it packs using 
fixed large chunks.