Hide Layer controls while scrubbing
Simple option in preferences to Hide Layer controls while scrubbing.
Why, because it improves performance by order of magnitude!
Also, Hide Layer controls while handling layers in timeline, same reason!
Or rewrite layer controls overlay.
We all know that AE became browser engine, but please don`t be internet explorer!
Oho Lepak commented
Layer handles, boundaries etc.
Problem of lagging is visible in scenario with lots of complex shape layers, you can see the struggle of drawing this overlays. If you hide them (Ctrl+Shift+H) its order of magnitude faster.
the dudes commented
Please define what you mean with "layer controls".