I notice a big time delay in using the volume and area commands on a nurbs model vs a mesh of the same model. The nurbs version takes much more time to finish the command than the mesh does. I guess this is expected but for me it’s a big time difference for large polygon count models.
My model contains both nurbs surfaces and nurbs surfaces made from heightfields which makes for a dense model, if I mesh the model the volume and area commands complete much faster on the mesh. The mesh in this case however also has a large polygon count.