Has anyone found that if they change a setting that causes a momentary black screen, but not a restart (such as soft shadows), the framerate improves significantly?
I thought it was simply because I'd dropped down a setting, but no... next time I started the game, it was on the lower setting, I ran into some frame drops, and turned it back to the higher setting, and the framerate was super smooth again. I then tried a few more, and it only seems to have an effect on the ones that cause a black screen.
So now, whenever I notice a big of chugging, I go to the options, switch a setting, hit apply to make it go black, and then switch it straight back, and it's all smooth again.