I had a decent framerate yesterday in my base. Today after updating the game and loading in my framerate has to be below 30 or 10 and during a horde I could barely hit zombies with melee. I have a pretty beefy system (4080TI, fast ram, AMDs 3D CPU) but it's easiest to give a clip from before and now after.
The one running terrible is on High settings while the one running great is a few days ago running on Ultra. In fact, changing the preset didn't alter the performance at all. All is recorded from the same base.
Videos are locked at 60 FPS but I can guarantee you I had above 100 before this new update.
Hope this gets some attention because the game is now unplayable for me.