Depth of Field is optimized REALLY poorly. On my 2060 it drops me down to 5-10 FPS on High, 10-20 FPS on Medium, turning it off instantly jumps me back to 30 on High 60 on Medium. It also jumps rendering latency up to about 300-350ms
Not sure what resolution it's running at but if it's at Native I'm running in 4k.