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Date: Mon, 28 Apr 2008 02:09:58 +0100
From: "Bruce M. Simpson" <bms@FreeBSD.org>
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To: David Naylor <naylor.b.david@gmail.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: boot failed with gzip'ed modules
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David Naylor wrote:
> Is there any plan to add bzip2 to loader (i.e. bzip2 modules and kernel) or to 
> geom_uzip?  If not is there a good reason why it is avoided or just a case of 
> lacking developer interest (or time)?  
>   
bzip2 uses a block-sorting compression algorithm, which requires 
significantly larger amounts of memory to operate than gzip, which uses 
a dictionary-based compression algorithm.

As such, gzip is more appropriate for use in boot-time and/or embedded 
environments, which often have limited heap space.