Sets your window to use the entire screen when you press F11
Solves the problem where using Alt+Enter causes black borders (at least at my resolution of 1600x900)
Unfortunately this mod is not a joke.
Note: in theory this mod shouldn't impact performance*. Without another mod to explicitly set the game to run in exclusive fullscreen/direct mode you won't ever be in it in the first place to feel the increased latency of turning it off.
*: Other than the keybind check every frame