HeIium

HeIium (formerly Hydrogen Reforged) is an unofficial port of CaffeineMC's "Hydrogen" mod, converted from Fabric to Forge.

This is free and open-source software that optimizes the game's memory usage by implementing more efficient data structures and improved logic. The mod is particularly useful in heavy modpacks with many modifications, but also provides small benefits even in light or vanilla builds.

Works on both client and server sides. Installation on both sides is not required, but use on the server currently doesn't show significant improvements.

Key Features

• Implements compact data structures for block states and their properties, significantly reducing memory consumption when using mods with many complex blocks
• Eliminates duplication of block model geometry, saving client memory when working with multi-component models
• Fixes several memory leaks in chunk loading code, preventing NBT data from disk from remaining in memory after chunk loading
• Simplifies and flattens block model predicates to reduce unnecessary chained linking

Compatibility

Currently, HeIium has compatibility issues with Create. This issue will be addressed in the future.

Mod support is maintained for versions 1.16.5 and 1.18+.