Watching performance when we head upwards of 200-300 + I see that each movement on the PCB surface causes a recalc and redraw of all airwires, which I suspect is hurting perf a bit as the transform of the component is also saved at the same time. Given that during layout, a lot of the time we are concerned with one group of components and their relationships, it maybe worth exploring the options to turn off all airwires, turn on some, turn on all etc. I'd also think this could impact calculations on the Reviews totals? Just thoughts as I watch perf.