From: Jakub Narebski <jnareb@gmail.com>
Date: Fri, 07 Dec 2007 22:14:15 GMT
Subject: Re: Git and GCC
Message-ID: <m3hciutaoq.fsf@roke.D-201>
In-Reply-To: <4759AC8E.3070102@develer.com>

Giovanni Bajo <rasky@develer.com> writes:

> On 12/7/2007 6:23 PM, Linus Torvalds wrote:
> 
> >> Is SHA a significant portion of the compute during these repacks?
> >> I should run oprofile...
> > SHA1 is almost totally insignificant on x86. It hardly shows up. But
> > we have a good optimized version there.
> > zlib tends to be a lot more noticeable (especially the
> > *uncompression*: it may be faster than compression, but it's done _so_
> > much more that it totally dominates).
> 
> Have you considered alternatives, like:
> http://www.oberhumer.com/opensource/ucl/

<quote>
  As compared to LZO, the UCL algorithms achieve a better compression
  ratio but *decompression* is a little bit slower. See below for some
  rough timings.
</quote>

It is uncompression speed that is more important, because it is used
much more often.

-- 
Jakub Narebski
ShadeHawk on #git