Compiling Shaders takes forever and happens often?

Now that I’ve gotten to the Landscape portion of the class, I’m seeing the limits of my laptop (Quad i7, but only 8g of memory and a fairly generic video card).
Ok… so when I start applying the materials, it seems that for every single layer, the shaders begin recompiling… is there a way once the material is designed to force the shaders to compile ONCE for all layers? Each layer takes about 10 minutes to compile, and I’m just doing the colors, I’m afraid to see how long it’s going to take once I add the grass. Kinda frustrating when you compile one, then have to wait for the next layer to compile… I thought I was being clever by planning two kinds of dirt, and adding a snow layer… but at this point I’m heading staring at a gray terrain and Compiling (number) …

found this on the unreal forums: https://forums.unrealengine.com/unreal-engine/feedback-for-epic/14588-massively-speed-up-light-building-and-shader-compiling-adjust-ue4-affinity-to-low

Seems to be helping some people. I know your pain when I’m on the road I use my Surface Pro 2 for unreal… Makes me miss my Dev PC every time.