Tectonic - with optimisations for Au Naturel 5

For the original version of this mod go here. As per usual, many thanks to the original authors and contributors for even making this work theoretically possible.

Tectonic is a great terrain generation mod that lies at the heart of the Au Naturel modpack, but the performance during chunk generation compared to vanilla often left something to be desired. This meant it was one of the practical blockers for my goal of practical survival play, as the server was often unable to build chunks fast enough for a player to play in real time, necessitating resource heavy and technically challenging pre-generation.

This is a fork of Tectonic 3.0.17 with the goal of making the mod especially performant to allow complex modded survival gameplay without pregeneration. Remember though, in practice, optimisations of entire modpacks depend upon the ecosystem of modifications, not just a single mod.

On a technical level, this is what we've tried to achieve (current change summary from Claude):

Tectonic v3.0.17 - Optimization Summary

Thread Safety (C2ME Compatibility)

Change File Purpose Volatile LOADED_STATE ConfigHandler.java:19 Ensures config state visibility across C2ME worker threads ThreadLocal cleanup hooks ConfigNoise.java:200, ConfigClamp.java Prevents memory leaks when threads are recycled

Memory & GC Optimizations

Change File Purpose LRU cache eviction (256 max) ConfigNoise.java:27-40 Prevents unbounded cache growth and thrashing Array pooling ConfigClamp.java:43-60 Reuses double[] arrays via ThreadLocal pools Cached empty ShortList ChunkAccessMixin.java Avoids allocation on error path

Noise Computation Reduction

Change File Impact Continentalness: 9→6 octaves continentalness.json ~33% fewer noise passes Erosion: 9→6 octaves erosion.json ~33% fewer noise passes