I checked yesterday my CPU utilization and it was maxed out now. I run a Core 2 Duo (E6600) @ 3.2 and the spread was 85% CPU and 15% on audiodg.exe
I found a possible way to reduce the audio.exe usage so I'll try it tonight. Guys please check your CPU utilization chances are that now it runs maxed out. I am having huge fps drops because of it and therefore lag specially upon spawning.
I tried turning up the quality settings on the game to everything on high except shadows and undergrowth. 4AA + 16AF and it still wouldn't off load the CPU. I have all my video card settings to high performance. I'll turn those up too tonight to see if I can get the game to offload from the CPU. Before I was not running maxed out. When I spawn it gets worse and that's still without any anti-virus.
Having the exact same issue. Framerate has tanked and gameplay feels jerky since patch. I went ahead and checked the CPU usage, sure enough i'm around 98-99% .
I know i'm still on a dual core, but my performance before this patch was more than acceptable. Now, not so much.