Virtualzing (or windowing, as it is sometimes called) is definitely one way to tackle this problem. However, it's not a silver bullet. The more complex the UI/r

Virtualzing (or windowing, as it is sometimes called) is definitely one way to tackle this problem. However, it's not a silver bullet. The more complex the UI/rendering is, the more optimizations you will need. The demo you link shows a very simple rendering with no complex user interactions, mouseover events, etc.