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sm-discuss - Re: [SM-Discuss] performance improvements - some evidence

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  • From: Seth Alan Woolley <seth AT positivism.org>
  • To: Ladislav Hagara <hgr AT vabo.cz>
  • Cc: sm-discuss AT lists.ibiblio.org
  • Subject: Re: [SM-Discuss] performance improvements - some evidence
  • Date: Thu, 3 Jun 2004 19:50:31 -0700

On Fri, Jun 04, 2004 at 02:34:16AM +0200, Ladislav Hagara wrote:
> Howdy all !!!
>
> Users of source based distros often declare that source based distros
> are more efficient as binary distros, that compiling and optimizing for
> particular hardware can bring noticeable performance improvements.
>
> Just comparing Source Mage with last Mandrake (i586.rpm on P4) and
> results of all my tests are more or less the same.
> Of course the startup of Source Mage is incomparably quicker.
> Some of my tests: conversion wav to mp3 or avi to mpg, bzip2 and
> bunzip2, md5sum, ...

time echo 'scale=4096;a(1)*4' | bc -l > /dev/null

I suspect md5sum and bzip2 are written to be fast on any optimization
setting. Maybe try to prelink your entire system for faster startup
times? Don't prelink with md5sum integrity checking yet though, I
haven't written the tool yet to integrate that into sorcery.

is compiling much faster? That's not going to use the vectoring
extensions, but more for daily linux use; it's important.

586 binaries are going to be noticably faster than 386. The jump from
386 to 586 was rather large, especially if there's no 387 coprocessor on
the 386.

If you're using mplayer to encode those avis to mpeg, mplayer is heavily
optimized at run-time.

Also, I suspect the newer compilers are much better at making fast yet
compatible code for all versions of processors in an architecture at the
expense of a bit larger executables.

The speed difference isn't all that much on a properly built binary
distribution. What matters more is the customization one can do with
source-based distributions, and far less breakage happens when you
upgrade, and when you do upgrade, if it does break, it is much easier to
resolve.

Seth

> Do not you know some "better" test ?
>
> - lace -
>
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--
Seth Alan Woolley [seth at positivism.org], SPAM/UCE is unauthorized
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