Just did a few tests with the latest patch-
Started out at a solid 30fps.
Started in Atlanta, used time acceleration for about 20 seconds and dropped it back to 1x over downtown. Framerate dipped to stream in new assets, then after about a minute the data was streamed in and the framerate was wouldn’t go above 27.
Used time acceleration again for another 20 seconds, continuing to fly east. Dropped out to 1x, and it took even longer for the data to stream in. After about 2 minutes it seemed that everything was streamed in, and my FPS wouldn’t go above 18.
Put on Time acceleration for a third time, did it for 20 seconds, dropped it to 1x. Data streaming took a really long time… it was streaming in new stuff for about 3-4 minutes. I actually got an error that popped up on screen that said my bandwitdth wasn’t good enough for photogrammetry streaming (I have never seen this message before). Tabbed out to check bandwitdth, and it was fine otherwise. The game finally streamed everything in and the frame rate wouldn’t go above 5 fps.
At this point I quit the program back to windows.
Loaded it up again, this time flying out of Detroit. Did the exact same thing outlined above and had the exact same results. I didn’t get a bandwidth warning this time, but after using time acceleration 3 times my frame rate was locked at 5-7 fps even after letting the sim run at 1x for 10 minutes flying straight forward.