Not a bug, but I thought it's worth mentioning that for Z16 and Z17 have given me quite an FPS hit compared to Z15 and previous.
Used to be 40-60 FPS nearly all the time, and now I'm looking at 20 - 30, but generally closer to 20.
Nothing significant has been changed on my PC
Is there something code wise that is now (largely?) more complicated than before that would cause this?