Windows 8.1 Home 64 bit
Nvidia Geforce GTX 970
Intel Core i7-5930K CPU @ 3.5 GHz
32 GB RAM
Broken: (2.79 5bd8ac9)
Short description of error
So this might be a known issue/limitation that will be fixed in 2.8, but in 2.79, I've noticed that having a boolean modifier completely disabled (no render, no preview) still runs in the background when its target is an animated object. This actually more than halves the playback framerate of the 3D window. If the modifier has no target, or the object is non-animated, framerate is fine.
Thanks for your time in reading this. Please let me know if there's a known workaround for this, or if this is already something of the past with the new dependency graph of 2.8 (I have not tried the 2.8 builds yet).