Hydrogen

• 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

• cloth config
• CreativeCore
• collective
• fabric api
• fabric-language-kotlin
• ForgeConfigAPIPort
• fzzy config
• midnightlib
• placeholder api
• yet another config lib

resource packs

• eating animation (only after 1.21.3)
• low on fire
• low shield pack

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.

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