Vastly speed up interactive preview

Man this thing is making some fantastic moves in the last year! Improvements in the UI and pretty much everything…but

The preview is slow while making adjustments. With complex networks you will find that you are making adjustment and wait wait wait for it to flow through the graph and update (although it IS much faster than it used to be).

When adjusting the sliders you are not getting to use all the cores like you do when you are “building” (and I do get why…multi-threading real-time interactions isn’t simple).

This puts you in a situation where you have to constantly build build build to see the output at reasonable resolutions. I wonder if there is a way to speed this up?