[vorbis] Performance tests

[Firelight Multimedia]

Never EVER use task manager to time stuff :) .. It couldn’t time a
horses arse :) (note that it still says 99% idle, even though playing
many direct sound software secondary buffers with lots of dmo effects
enabled causes windows to grind to a halt :).. nice how it somehow
excludes directx from the cpu metering)
The best way is to time in from the code using a QueryPerformanceCounter
or RDTSC time stamp pair etc (don’t use millisecond counters).. I have
done this and found mp3 using about 3% with ogg about 6% on a p3-500,
but that was a while ago.  I might do this again once I get the latest
decoder code.  I think I am still on the initial 1.0 release.

Brett Paterson
Firelight Multimedia
FMOD SoundSystem
http://www.fmod.org

> -----Original Message-----
> From: owner-vorbis at xiph.org [mailto:owner-vorbis at xiph.org] On Behalf
Of
> Alen Ladavac
> Sent: Tuesday, 16 October 2001 5:23 PM
> To: vorbis at xiph.org
> Subject: Re: [vorbis] Performance tests
> 
> Just one thing.... TaskManager in WinNT4 is lying (well, it's not
exact
> :))
> when it comes to small percents. Probably due to taskscheduling
> resolution.
> You'd ned a better tool to measure speed, not task manager.
> 
> Alen
> 
> ----- Original Message -----
> From: <volsung at asu.edu>
> To: <vorbis at xiph.org>
> Sent: Tuesday, October 16, 2001 14:03
> Subject: Re: [vorbis] Performance tests
> 
> 
> > On Tue, 16 Oct 2001, Erik Olofsson wrote:
> >
> > > I did some testing of vorbis codec (Winamp plugin) on a Pentium
166
> MMX,
> and
> > > found that the performance is pretty good. I got 3 % cpu
utisization
> if
> I
> > > turned dithering off, and 5 % otherwise. This was with a 138 kbit
> song.
> It's
> > > pretty long to mp3 performance that was 0 to 1 % on that machine
for a
> 128
> > > kbit song.
> >
> > As Michael pointed out, this seems quite low.  My rough tests were
> showing
> > 30-40% CPU use w/ Pentium 166 decoding ogg.
> >
> > ---
> > Stan Seibert
> >
> >
> >
> > --- >8 ----
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> 
> 
> --- >8 ----
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