Some people here wrote about a performance boost by the new patch, but for me it’s the opposite.
Big airports (I’ve tried Heathrow and O’Hare) are basically unusable now. I get around 10 -12 fps when I try to look around in the cockpit with some 0,5 - 1 second freezes. The audio “buzzes” (quarter-seconds during which the same pitch keeps playing) are unbearable; I had those very occasionally during loading but never once I was in the cockpit.
All the while, both CPU and GPU are pretty bored at 30 - 35 % (“limited by MainThread”), but my whole system feel sluggish (Alt-Tab takes a second or so). I’m running an i7-7700, 16 GB RAM, GTX 2060 Super and had no such problems until the patch.
The culprits are definitely the airports. Heathrow behaves the same in an Icon A5 as it does in an A320, while smaller airports work the same. (I might say a bit slower but I could be imagining that.)