Can confirm my performance is also terrible. CPU jumps to 100% every 5 minutes and causes a full game freeze for up to 10 seconds. Did not happen prior to this patch.
I also have a Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz 3.50 GHz

My pc however has an RTX 3060, wih 32 GB of DDR4 2133 and 2 ssds running in raid 0 over sata.