You will see your FPS value on your screen (in game, not in menu) and the percentage next to it. Enable 'DISPLAY FPS' in 'Options - Mod options - Performance comes first'. This mod makes the game do less calculations per each frame, allowing the game to catch up with everything later, since everything is tied to time and not FPS. You don't need this mod if you have a good CPU. People with low-end CPUs noticed performance increases for up to +30 FPS.
This mod optimizes CPU usage while not changing any visuals.
