Mostly just inside of my house where I never used to have lag issues, near my iron farm which never caused any noticeable lag & by another one of my farms in which again never had issues regarding lag or FPS drop, it seems to be fine when I get away from the area but It does also occur in newly generated worlds when walking around.
My PC specs are pretty decent so I shouldnt be having any issues seen as I never had issues regarding FPS drop, or lag before I updated to 1.17.
Yes it happens without Optifine as well, although I dont play without Optifine. I never had any issues with frame drops before I updated to 1.17 and its just super duper laggy in places that previously were not laggy at all.
It could be on Optifines end but I wont be able to tell until they release a full version of it, but like I said above I never appeared to have any issues in the parts that Im having issues in now. I used to be able to keep my render distance on 20 with no problems but after the update I had to bump it down to 12 or I wouldnt hit anything above 70 fps when my normal is 200-300.
mhm, let me generate a newly made creative world without optifine, ill attach a ss if i can reproduce it.
just seems to be an issue with optifine itself, nevermind
21w08b: Around 280-300 FPS
1.17-rc2: Around 100-130 FPS
OS: Windows 10 Home
CPU: Intel i7-10870H
GPU: GeForce RTX 2070 - 16GB RAM