So this recreates the entire scene graph whenever the UI needs to be re-rendered? What happens when you use this in a complex application with lots of different

So this recreates the entire scene graph whenever the UI needs to be re-rendered? What happens when you use this in a complex application with lots of different nodes that needs to be updated frequently? Think a midi tracker / DAW / video editor, where it's common to have a vertical bar that moves across the screen indicating the current section of audio/video being played. Is this still suitable for that sort of application? I get that it's doing diffs and not actually re-rendering everything, but how heavy is the call to create each node?