Why does editing become so pixelated and laggy, and how can I solve it?

Basically, whenever I try to edit or move something, my resolution gets really pixalated and editing is really choppy. I'm just editing vector shapes (using Rubberhose as well, though I had the problem prior as well). What's causing this? Any ideas?
I'm using the latest version of AE. Specs of machine are:
Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz, 4201 MHz, 4 core, 8 processors
32GB RAM
NVIDIA GeFORCE GTX 1060 6gb
Any advice or tips would be welcomed.
