Getting a good framerate in Arma Reforger can be troublesome, but this guide will help. As shown below, the “Environment quality” setting should be set to the lowest setting and lower grass quality. This gives an excellent boost to FPS. I got 90 FPS this way with the latest stable build of Arma Reforger. This is much better than the default performance I was getting before, with 30 fps at most. The game still looks OK and is much more playable with 70 FPS than with 30. But it does need a lot of code optimization to make it run better, I do not know if you can do the same tweaks on an Xbox. But this is a great help. Even if you were in a firefight and getting 50 FPS, that would be far better than 21. It is very good to find an awesome tweak like this to greatly help out with gameplay.
Lowering FSAA settings can also help.