"we enhanced the DWM to recognize when a game is running in a borderless full screen window with no other applications on the screen. In this circumstance, the DWM gives control of the display and almost all the CPU/GPU power to the game. Which in turn allows equivalent performance to running a game in FSE. Fullscreen Optimizations is essentially FSE with the flexibility to go back to DWM composition in a simple manner."
I’m familiar w/ the blog post and the rabbit hole that it has created. It’s especially fun to read some of the conspiracy theories on it.
The suggestion I made was a common suggestion on the WoW forums and has netted a few results including my own first hand experience.
Most recent example:
Another example:
https://us.forums.blizzard.com/en/wow/t/83-fps-drop-and-freezing/428353/34
I almost wanna say this is related to GSYNC/dx12 interaction somehow. I’ve seen quite a few posts all seem to have that common thread, I never needed to disable the optimizations until I got a gsync monitor myself so I’m not sure.