It seems that it has improved very much since I've first seen the demo, but it still takes up to ten seconds to render changes. I guess that's simply because th

It seems that it has improved very much since I've first seen the demo, but it still takes up to ten seconds to render changes. I guess that's simply because the demo page is huge, but that negates the purpose of the demo; it would be great to have a partial rendering mode if feasible ;-)