Parked up at EGLL, with all my normal menu items on, bouncing around 35. At spawn it was nearer 30, but crept up as things loaded in:
The only items I have turned off in the menu are “Checklist”, “Basic Controls”, and “Navlog”.
As far as I can see the only that gives an FPS boost is the VFR map. The others do next to nothing.
Everything off except VFR map:
Finally, VFR map turned off:
I did see it peak for a split second at 38fps. Average is about a 1.5fps boost by turning the VFR map off.