SubChunker Companion
A utility mod for the SubChunker benchmarking tool
About this Mod
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
Available Versions
How to Install SubChunker Companion on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "SubChunker Companion". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.9 (+36 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
SubChunker Companion server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is SubChunker Companion compatible with fabric?
SubChunker Companion officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with SubChunker Companion – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if SubChunker Companion consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Rent Modded Server
Install SubChunker Companion with just one click on your server.