I noticed this because I optimized everything on my avatar, I noticed with 3 different avatars and even worlds, in which everything worked fine before the update, well after the update the game goes wrong. I lost around 20-30 fps max...
PS: I would add that I optimized everything on my avatar, I have a download size of 21 MB, and I used the DarkPlayer that vrchat recommends for optimization. and I don't have a texture in 4k because I hate it especially since it's useless.. (I'm at 80 mb of texture memory) with the objects that I can put on my hands, and my clothes (and when I look into space, I run at 115 fps, whereas before the update I ran at around 150 fps, and sometimes I drop to 80 fps for no reason).