Forge 1.19.2 - 43.3.5

Modlist:

• Quark-3.4-418
• AutoRegLib-1.8.2-55

Reproduction:

1. Create new world with seed 3765661731195041821 with large biomes world type.
2. /tp -5208.12 168.13 72.09
3. Enjoy(no) the speed of the generation of the world.

Disabling Permafrost feature fixes issue.

You can also create a minecraft:frozen_peaks single-biome world to instantly kill your pc

Been investigating this in the 1.20 alpha. It's an algorithmic issue - permafrost is generated in "blobs" similar to underground clay, but because the blobs are very large and there's tons of them, the game spends a lot of time in the blobs code.

You can resolve it by turning down the "horizontal size" of permafrost in the config file (set it to like 15) and increasing the rarity. Of course, it will make the blocks less common, but they're already very common I think.

We're considering changing this to a noise field instead of using blobs.