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Re: mplayer 0.90, was Re: why mplayer not in Debian



On Thu, Jul 24, 2003 at 11:50:00AM +0200, Matthias Urlichs wrote:
> Hi, Andrew Suffield wrote:
> > On Thu, Jul 24, 2003 at 10:18:22AM +0200, Matthias Urlichs wrote:
> >> Well, when the glibc people had this discussion (the switch to ELF),
> >> the performance penalty was found to be on the order of 5%.
> >> 
> ... by testing with somewhat typical programs.
> 
> >> I don't know whether modern CPUs' register aliasing hardware changes
> >> that number.
> > 
> > On anything more recent than a 486, the answer is not a percentage,
> 
> It is -- if you do the same tests, and compare.

Well, you can get an *answer* that way, it's just not very accurate or
useful :P

> > it's a research paper. Just to _describe_ the performance implications.
> 
> ... assuming you want to translate the results to a different set of
> tests.
> 
> ... or, for that matter, if you want to interpret the variance you'll get
> in the test results, assuming it's significant, which it probably will be.

You generally get a significant variance when you modify the input
data. Although that doesn't always hold.

-- 
  .''`.  ** Debian GNU/Linux ** | Andrew Suffield
 : :' :  http://www.debian.org/ |
 `. `'                          |
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