SubChunker Companion
This mod works alongside the SubChunker Benchmarking Utility to automatically generate chunks when the server starts up using Chunky.
There are two versions of this mod:
Modern
This version for 1.21.11 and above provides automatic Chunky startup and slight performance improvements by reducing the computational load during chunk generations. These changes will make the server unusable while generating chunks. Remove the mod when you intend to play on the server. Additionally it provides a few seconds startup improvement by skipping loading nonessential aspects of the game such as advancements and recipes.
Legacy
This version for Minecraft 1.21.10 and below only provides the automatic Chunky startup.
The mod has been verified to be working with the following mods:
- C2me (OpenCL and regular)
- FerriteCore
- Fabric API
- Structure Layout Optimizer
- Lithium
- ScalableLux
- ServerCore
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as subchunkercompanion-modern-1.0.0.jar — drop this file into the mods folder
- Download size: 12 KB
- Download link checked 20 Aug 2026 — working
These come from our own check of the pack file, not from the source page.