Re: [gentoo-dev] Having fun with compression

[Chris Gianelloni <wolf31o2@gentoo.org>]

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On Tue, 2006-05-02 at 18:27 +0200, Patrick Lauer wrote:
> On Tue, 2006-05-02 at 08:50 -0700, Ryan Phillips wrote:
> 
> > Patrick, 
> > 
> > did you benchmark CPU load?  Often bzip2 takes 3x as long to
> > uncompress a package than bzip.  Often, the space savings doesn't
> > justify the cost of how long it takes for the cpu to decompress the
> > archive.
> 
> I did not compare CPU load. Maybe I should do that :-)
> 
> But the average user will take longer to download than to uncompress, so
> my rationale for this experiment was space reduction "at all costs". The
> 15% average gain should outweigh CPU issues.
> 
> Also - on my test system I managed to _compress_ at 1,5MB/s. If anyone
> could provide some performance numbers for slower systems  it'd be
> easier to evaluate the tradeoff.

I'm sure somebody *cough* vapier *cough* could find you a slow enough
machine to compare against.  Perhaps something in the double-digits of
MHz.  *grin*

-- 
Chris Gianelloni
Release Engineering - Strategic Lead
x86 Architecture Team
Games - Developer
Gentoo Linux

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