Re: General Performance Questions

Clint Weisbrod wrote:
> Hi All,
> 
> After finally getting Chromium 1.8 built and configured. I've noticed  
> that the demo applications and my own have at least a factor of 2  
> degradation in frame rates when run under Chromium. I did expect  
> reduced frame rates, but not to the extent I'm observing. I'm running  
> everything on one box at this point so network latency isn't even a  
> factor yet.
> 
> I'm completely green w.r.t. Chromium, so please forgive any ignorance  
> included in this question:
> 
> Is it a reasonable assumption that I can expect frame rates to be  
> effectively halved if I run my application under Chromium?

It depends on a lot of factors.

If you're using the crdemo.conf configuration above, the OpenGL 
commands are getting packed into buffers and sent over a socket to the 
crserver/render SPU where they're unpacked and rendered.  Clearly, 
that has a cost.

Even if you're running with just a appfaker/render SPU, there's an 
extra layer of function calls for each OpenGL call.

Your network speed and the nature of the commands you're sending 
matters a lot.  Sending a lot of glVertex commands won't be as fast as 
using a display list, for example.

If you do parallel rendering, at some point you should see better 
performance than a single workstation.  But that depends on how many 
systems you have, the network, the rendering vs. compositing time, etc.

-Brian



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