FPS drops and stutters

This game is awesome, but the performance is killing me. I have a quite powerful PC, capable of running modern games on high/ultra settings. But Insurgency drops to 40 FPS sometimes, no matter what settings I use.

Is there any progress on performance issues?
Can I tweak this somehow?


I recently tried this guide out, but I can't confirm results yet, but you can try it yourself.


May the odds be in your favor.