Ogidni causes major performance problems in the nether with the latest official build of Sodium installed. This affects multiple users with different hardware when they go to the nether on my server. There is also lower than usual performance in singleplayer as well.
Without Ogidni:

WIth Ogidni:

Could I have a mod list and log? I haven't tested the Nether much, but I presume you have a mod that adds blocks in the Nether that use FRAPI, such as LambdaBetterGrass?

If you can, run a sampler on your client with VisualVM or Java Mission Control - if you can show what the render thread spends it's time doing that'd be very helpful.

@comp500 I will send the full mod list. I don't have LambdaBetterGrass, the only mod which adds blocks in the nether to my knowledge is BYG. I took a CPU sample with VisualVM if that is what you need but GitHub does not support the nps file type but I will send it to you through Discord.

Fixed by rewrite!