The performance is appalling for me. I have a 1080Ti as well, plus the rest of my specs:
Windows 10 Pro
Core i5-6500 3.2Ghz
16GB RAM
Samsung SSD 860 EVO 1TB
GTX1080Ti
70MB Internet Connection
The game takes ages to load, so at least 2 minutes to get to the main menu, then another two minutes minimum to get into a flight.
Framerate is poor, running in High with resolution set to 1440p. Changing to medium makes no difference. Poor is at least 15-20 fps.
I have the game set to 60fps VSYNC on. VSYNC off no difference. 30FPS, no difference.
I get at least 10 seconds pauses every 2 minutes.
In short, its terrible. I can run Star Citizen practically flawlessly, and we know what state that is in currently!
Not an impressed user. I have no idea what can fix this performance and i dont understand how others with lesser specs say they have great performance.
Finally i turned data streaming off and it didnt change the performance.