[vorbis] RC3: I'm impressed

[John Morton]

On Wednesday 16 January 2002 14:10, Wilson wrote:
> ----- Original Message -----
> From: "John Morton" <jwm at plain.co.nz>
> To: <vorbis at xiph.org>
> Sent: Tuesday, January 15, 2002 6:09 PM
> Subject: Re: [vorbis] RC3: I'm impressed
>
> > There is presently a noticable speed difference between the vorbis
> > decoder and the mp3 decoder in xmms on sub Duron/Celeron system, which I
> > expect people will use for things like dedicated jukeboxes at home, in
> > the office and in DIY car stereo systems. It really starts to matter if
> > the same machine
> > is doing other CPU intensive tasks, like decoding several streams at
> > once, applying sound filters, displaying a video stream at the same time.
> > A spot of
> > hand optimized assembly made a big difference to a lot of mp3 decoders,
> > so there's no reason to think it won't improve the vorbis decoder.
>
> What's a sub-Duron/Celeron? Something like a Via C3 or a Crusoe?

Pentiums, P-IIs, K6's of various sorts. Maybe I should have said 'pre'. 
Basically, all the pentiums and k6s I've used tend to struggle to keep the 
decoding buffer full, particularly if there's any other CPU intensive work 
going on. The MP3 decoder only had problems if the disk IO was saturated, and 
had no trouble catching up if it wasn't. These problems vanished when I went 
up to a Duron, and I know other people who've had more reliable performance 
after going to a Duron or Celeron of one form or another. 

Admittedly, a box like this used as a dedicated jukebox will probably have 
not problem, but it does tend to add up when you've a lot of channels, 
streaming media and a game engine running at the same time. 

This is all just hot air anyway; I'm sure the people who will do/are doing 
the actual optimization work have there priorities in the right order.

John

<p>--- >8 ----
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