I'm not sure if this helps, but I have in the past found that calls along the lines of :
geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,vertices->size())); can take ages. In particular, I think the DrawArrays call can take a while. On an app of mine, I was doing the above once per frame, and was getting very low frame rates. In the end I just set up a large enough vertex list with a bunch of them not really drawing anything (e.g. through repetition, or through lots of zero vertices). Note that this is from memory, and I wasn't so hot with OSG at the time, so don't all shoot me at once, but it might be somewhere to look. David
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