|VstBoard runs on multiple cores|
Every time a cable is added or removed, a new rendering map is generated, ordering plugins and spreading them to the multiple cores. Another optimization is made several seconds later to get a better cpu usage measurement, the "rendering map" is then saved in the program and will be recalculated only if something changed.
There's no way to manually rearrange the map (yet?) but you can click on a solver cell to force a new measurement/optimization, this will take in account the cpu usage "so far" to build a new rendering map.