IF YOU GET AN ERROR PASTE THIS IN YOUR JAVA ARGUMENTS:

-Dorg.lwjgl.system.stackSize=256

Hydrogen a powerful Fabric-based optimization modpack focused on performance and essential quality of life improvements. Whether you're exploring vast singleplayer worlds or playing multiplayer servers, Hydrogen delivers a smooth and enhanced vanilla-like experience.

Perfect for players who want to:

Boost FPS.
Enjoy a near-vanilla feel with subtle improvements.

Features

New and faster render engine.
Telemetry disabled.
Quality of life mods.
Easly transform singleplayer world in multiplayer.

❗Important: This modpack uses VulkanMod, which replaces Minecraft's OpenGL rendering engine with Vulkan®. This makes the game faster and smoother, but not all mods are compatible with VulkanMod, so if you plan to add other mods, make sure to check them before playing.

mods

alternate current
bad optimizations
bobby
Concurrent Chunk Management Engine (C2ME)
clean f3
dynamic fps
eating animation (only before 1.21.4)
enhanced block entities
entity culling
e4mc
fastquit
ferritecore
kennytvs-epic-force-close-loading-screen-mod-for-fabric
fps display
full brightness toggle
GPUBooster
krypton
ksyxis
lithium
modernfix
modmenu
morechathistory
moreculling
noisium
no telemetry
particle core
resourcify
scalable lux / starlight
servercore
server pinger fixer
threadtweak
very many players
VulkanMod
Zoomify

dependencies

resource packs

Benchmark

Test environment (as run):

GPU: NVIDIA RTX 3050
CPU: 13th Gen Intel i7-13700
RAM allocated to Minecraft: 4 GB
Minecraft version: 1.21.5
Modpack version tested: 4.4.0
Modpack defaults used: Render Distance 14, Simulation Distance 5, Fancy Graphics, All Particles, Fancy Clouds, Smooth Lighting, Entity Distance 100.

Methodology:
Measured average world creation time across six seeds (named hydrogen1 … hydrogen6) and recorded approximate average in-game framerate. "World creation time" here refers to the time measured for creating/loading a new world with the above settings (results and raw numbers below).

Results (raw samples and averages):

Metric	HydrogenPack (modpack)	Vanilla
World creation samples (sec)	`0.866, 1.033, 0.800, 0.633, 0.633, 0.900`	`0.933, 1.996, 1.666, 1.666, 1.600, 2.000`
Average world creation time (s)	0.811	1.644
Time change	−51%	—
Approx. average FPS	~1800 fps	~700 fps
FPS change	+157%	—

Analysis:

On this hardware and with 4 GB allocated, Hydrogen reduced the average world creation time from 1.644 s (vanilla) to 0.811 s — a reduction of approximately 50.7%.
Average framerate observed in these tests increased from ~700 fps (vanilla) to ~1800 fps (Hydrogen), an approximate 157% increase.

Linux users

If you use this modpack on linux you have to paste this line on the java arguments of your launcher

-Dorg.lwjgl.system.stackSize=256

you also need to disable Zoomify