[osg-users] Speed of Shaders

[Sebastian Messerschmidt]

Hi Daniel,
> Hi there
>
> I have experienced that generally as soon as I use shaders, my DRAW time starts to increase significantly, and this even if I just reimplement the fixed function pipeline basic functionality.
>
> I wonder if some out there make the same experiences. Either it is my poor shader programming (i know about if's and branches that kill performance) or is there really a price for the added flexibility?
> I'm running a GTX TITAN so usually there is plenty of power...
1.) Are testing release mode?

2.) Have you tried to rule out state changes etc. by providing minimal 
shaders?
I once had some serious performance problems from lots of unneeded 
uniform and texture binding. With the pragmatic shader composition this 
vanished.

Cheers
Sebastian
>
> Cheers,
> Daniel
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=66719#66719
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