Tested and found that SFCR in 1.19.4 has a critical lag even I already impl culling on clouds.
Here is a simple compare nearly same culling amount and mesh built:


I'm not used to play on 1.19.4. So I'm not have any idea that why is.

Open in case anyone will ask.

Tested again and it's fps as same as other version, strange.
Just my PC dump out in that day maybe...