Modrinth · Minecraft mod

Hydrogen

Reduces the memory usage of the game in more modded scenarios

Choose a version Pick your version below, then grab the matching file.

Quick answer

Which Hydrogen release should I use?

Updated 5 years ago

beta file mc1.17.1-0.3.1

Game version 1.17, 1.17.1

Loader Fabric

Hydrogen mc1.17.1-0.3.1 targets 1.17, 1.17.1 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.

Where it goes

Is Hydrogen required on the client, server, or both?

Installation on the client is optional. Installation on the dedicated server is optional.

Client Optional

Dedicated server Optional

Loader for this release Fabric

Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume

The source marks this as usable on both the client and server.

Understand client and server requirements Read the Minecraft installation guide

What else does Hydrogen mc1.17.1-0.3.1 need?

mc1.17.1-0.3.1. Change the file and its required mods may change too.

No extra mods listed for this file

This file does not list any required mods. Do not add a library just because a different file uses it.

This file does not list any required or optional mods.

Before you install it

Add Hydrogen without breaking your instance.

Built for Hydrogen mc1.17.1-0.3.1. Pick another file and the loader, install side or required mods may change.

01
Stick to this file

Use mc1.17.1-0.3.1. It targets 1.17, 1.17.1 with Fabric; another release may have different loader, side or dependency requirements.
02
Bring the mods it needs

This file does not list any required mods. Do not add a library just because a different file uses it.
03
Put it on the correct side

Installation on the client is optional. Installation on the dedicated server is optional.
04
Pick the file you checked

Use the “Get this file” button beside mc1.17.1-0.3.1. It opens that exact file at the source.

About this project

What does Hydrogen add?

Status

January 23rd, 2022

This repository has been archived as we do not have the time or resources needed to maintain the project. No further updates will be published, and we won't be providing help for using it.

If you are looking for a replacement, consider taking a look at FerriteCore, as it generally offers more significant improvements to memory usage in modded scenarios and is currently available for the latest version of Minecraft.

graph

Memory usage before and after installing Hydrogen into the popular All of Fabric 3 modpack.

Hydrogen is a free and open-source mod designed to reduce the game's memory requirements by implementing more memory-efficient data structures and logic. It's primarily designed for more heavily modded scenarios, but can offer (small) improvements even in lightly modded or vanilla scenarios.

The mod works on both the client and server, and doesn't require the mod to be installed on both sides. However, the benefits of running Hydrogen on the server are pretty small as of the moment.

Features

Implements more compact data structures for block states and properties, reducing memory usage significantly when using mods that add lots of complex blocks
De-duplicates block model geometry, saving memory on the client when multi-part block models are used
Fixes a few leaks in chunk loading code that results in the NBT data on disk being kept in memory after a chunk has loaded
Simplifies and flattens block model predicates to reduce unnecessary chaining

Project description from Modrinth.

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