On 10. Apr 2009, at 11:07, gr3go (via Nabble) wrote:

> The framerate is ~3FPS.
> Observing the statistic overlay, the transmission+compression time  
> seems to be the botleneck.
>
>
> Here is a screenshot of the statistic overlay: 
> http://g.imagehost.org/0880/statistics2.gif
>
> We use a 100mbit intranet. I tested the transfer speed, and it's  
> around 10MB/s.

Your analysis is correct. Assuming an image size of 800x600, which is  
roughly what you seem to be using, your raw image size is around 1.4MB  
- which should give you >5FPS.

I strongly suggest to upgrade to Gigabit ethernet, a switch and 4  
cards should be around 100 Euros.

The communication pattern (many-to-one) tends to be an issue for some  
network cards due to congestion on the destination host. The 0.6 tree  
contains a patch (sendToken) which you might try.

Otherwise better compression should help you to get better  
performance. Again, the 0.6 tree has a patch (tightRLE), which is also  
already applied in the trunk. We are currently working on a plugin  
interface for compression which will be published with a few plugins.  
You can then write your own.


HTH,

Stefan.



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