I've noticed that recently AE's preview has slowed significantly on a variety of projects I'm working on. We're talking anything from simple motion graphics to camera moves on 3d layers.
I'm not using Raytracing, for what it's worth, and I'm on the latest version of AE on Windows 7: 13.7.1.6
I have two video cards on this machine, a Geforce GTX 680 (main) and a GTX 970. The CPU is an i7-3930K, and I have 32gigs of RAM.
It seems like this is a somewhat recent development, perhaps in the last month or so it's become a commonplace occurrence in my projects. Does anyone have suggestions on how I can test or tune my AE hardware configuration to find out where the bottleneck is occurring - or have you experienced something similar on comparable hardware?