Is the command vaupdate or the section creation faster when all the entities in model are VA entities? Or also presence offline meshes slows down the process?
It doesn’t matter if the object is a VisualARQ object or a native Rhino object. The complexity of the object’s geometry, and the amount of lines, edges, curves, etc, is what will affect section calculation speed.
Free-form surfaces and very dense meshes are slower, because the silhouette needs to be computed, while in planar surfaces, the already computed boundary is the silhouette.
The algorithm is practically equal to the one used in Make2D.