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Hassium is a high-performance Minecraft optimization mod providing efficient storage, network optimization, chunk caching, beyond-view rendering, and lighting optimization. Covers Minecraft 1.20.1–1.21.11 on Fabric / Forge / NeoForge.
Repo: github.com/limuqy/Hassium · 简体中文
| Feature | Description |
|---|---|
| Efficient storage | Higher-ratio world chunk compression for smaller saves; keeps vanilla Region (.mca) layout |
| Network compression | More efficient compression for chunks and packets — less bandwidth and wait time |
| Chunk cache | Loaded chunks are kept locally; revisiting an area prefers the cache instead of full downloads |
| Section delta | On cache mismatch, fetch only changed sections (sectionDelta) instead of the whole chunk |
| Beyond-view render | When client RD exceeds server view distance (multiplayer), fill the outer ring from local cache (render-only; no out-of-range server requests) |
| World export |
/hassiumc export writes the local cache as a vanilla Anvil singleplayer world |
| Light stripping | Server can omit light data; the client recomputes lighting locally to save more bandwidth |
| Light cache | Light data is cached after first recompute; cache hits apply pre-computed lighting directly, skipping expensive recomputation |
| Smooth loading | Caps main-thread work during join and view expansion to reduce hitch spikes |
| Client-friendly | Clients without the mod can connect by default; install on both sides for full compression and cache benefits |
| Traffic metrics |
/hassium stats (server) and /hassiumc stats (client) to inspect compression and cache results |
Feature details: Features.
- Download the loader-specific JAR from GitHub Releases or CurseForge.
- Drop it into
mods/on client and/or server. - Launch the game; config files are generated under
config/hassium/. - Back up worlds before first enabling storage (see FAQ).
Details: Installation.
| Page | Content |
|---|---|
| Installation | Download, prerequisites, per-loader notes |
| Configuration | Full config table and GUI paths |
| Commands |
/hassium and /hassiumc reference |
| Features | Feature deep-dive |
| Beyond-View-Render | Beyond-view render details |
| World-Export | Cache world export |
| Compatibility | Multi-mod compatibility table |
| Support-Matrix | Version × loader matrix |
| Data-Plane-and-Failover | Control failover and weighted routing (server ops) |
| FAQ | Frequently asked questions |
| Troubleshooting | Debug paths and logs |
| Minecraft | Fabric | Forge | NeoForge |
|---|---|---|---|
| 1.20.1 | ✅ | ✅ | ✅ |
| 1.20.2–1.20.5 | ✅ | — | ✅ |
| 1.20.6 | ✅ | ✅ | ✅ |
| 1.21.1 | ✅ | ✅ | ✅ |
| 1.21.2 | ✅ | — | ✅ |
| 1.21.3–1.21.10 | ✅ | ✅ | ✅ |
| 1.21.11 | ✅ | — | ✅ |
Full nine-segment table: Support-Matrix.