Overview
Adjust your FPS by changing the resolution scale in the game settings. After reaching a satisfying resolution to lag scale, adjust other graphic settings to smooth your game play while maintaining playable FPS.
MAXIMIZE FPS: Resolution Scale Adjustment
Increase FPS, right now, in the game by adjusting your Graphic Resolution Scale in the game’s Option Menu.
HOW:
Press Esc
Choose OPTIONS
Choose GRAPHICS
Adjust Resolution Scale to 75% (to start)
Click APPLY (Next to the resolution scale)
Click SAVE
The resolution change can be made on-the-fly with a full zombie wave, if you like. It is my suggestion that you attempt to adjust the resolution scale to 75% when the mobs are near you. This will ensure you can adjust it once or maybe twice, while you notice the changing FPS number on your top left of the screen.
Having anything above 15 FPS during a massive screen of mobs is desired.
This simple solution will keep you in the game longer until Jackto delivers a final product.