
Modrinth · Minecraft modpack
Optimization
🪽 Maximum performance, eliminates stuttering, and speeds up anything while not breaking vanilla. Sodium, Vulkan, Embeddium and Celeritas.
Quick answer
Which Optimization release matches 1.21.6?
Optimization Sodium-1.21.6-3.9 is a complete pack release for 1.21.6 with Fabric 0.16.14. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 12 mods in this pack file.
Pack setup
How should I set up Optimization for players and a server?
Use Optimization Sodium-1.21.6-3.9 as the pack version. Install the pack as its own launcher instance. The creator’s listing does not name a separate server file, so check the release notes before setting up a dedicated server. Do not upload the ordinary client folder blindly.
A pack is a matched client and server setup, not one mod with an install-side label. Keep its release, loader, manifest and overrides together.
These numbers come from the pack file you chose. “Not labelled” means we don’t know which side it belongs on—not that it is safe everywhere. The file count is not a RAM estimate.
What are the server requirements for Optimization?
Optimization Sodium-1.21.6-3.9 on 1.21.6. The pack contents and setup notes below stay tied to that release.
The selected pack release is Optimization Sodium-1.21.6-3.9. That file is for Minecraft 1.21.6 with Fabric 0.16.14. It contains 12 mod projects. The creator’s listing does not name a separate server file. Check their notes before using one, and do not upload an ordinary client folder or rebuild the pack mod by mod. A file count cannot tell us the right RAM, CPU or storage; size the server for the players and world you actually run.
About this project
What kind of pack is Optimization?

⭐ Optimization Modpack
This is a lightweight modpack focused on optimization, aiming to maximize performance. It consists only of well-chosen optimization mods, with no unnecessary mods included, which sets it apart from others
✨ Features
- Maximum performance
- Fast updates
- Pre-configured settings
- Wide selection(Sodium, Vulkan, Embeddium and Celeritas)
💽 Installation
- Use the Modrinth App or use other launchers that can install modpacks from Modrinth, such as PrismLaucher
- If you are using a official launcher, convert the .mrpack to .zip using the Modrinth Pack to Zip Converter
🧩Java and Flags
- Use Java Eclipse Temurin 25 with the following flags:
-XX:+UseZGC -XX:+UseCompactObjectHeaders - For more details, read the article
Project description from Modrinth.
Mods in Optimization Sodium-1.21.6-3.9
Open any mod on Modpacks.ch to check its files and dependencies.
819a2a441d23316eea88b9100bf0d6c656f8eccd · Modrinth version NV7cBXlf · Project link unavailable Client only0951ad76de856b2e8804f06efc4302f828dc3bff · Modrinth version tlZRTK1v · Project link unavailable Side not labelledd3bd78860580da556990726af3bed1169e69933e · Modrinth version cz0b1j8R · Project link unavailable Side not labelled56c5a0617863c53cf7e338d6ff862d02801a1f75 · Modrinth version 5wVZFo2d · Project link unavailable Client onlyb273a883a3864108453a5d5f0b9e4f0a870c9579 · Modrinth version F5TVHWcE · Project link unavailable Side not labelled3f9169c7569369d0520016d602bbc93ea8da0b42 · Modrinth version NYAf6CuM · Project link unavailable Client onlyc44081dadc343918b3623dc69ef2d395fceed99c · Modrinth version ah71vPRw · Project link unavailable Client only53d76354587cd1965b842fdce7cff965b5c52fe5 · Modrinth version CtMpt7Jr · Project link unavailable Side not labelledad17f085506040b3be320cde489b365f4c7484f6 · Modrinth version 9JPEk4KN · Project link unavailable Client only78f513f63036bc8fa061b5ee1aa88d5779f5a52c · Modrinth version XWGBHYcB · Project link unavailable Side not labelled1e9b9ec184470aa5d52e0d968b5e87cf087efae2 · Modrinth version ESxkwc6w · Project link unavailable Client only2d635c3d938aa3f75b0ec61c7402eeea2f9c30a9 · Modrinth version ND4ROcMQ · Project link unavailable Client onlyPick your setup
Optimization by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
2 loader builds26.1.2
2 loader builds26.1.1
1 loader build26.1
1 loader build1.21.11
2 loader builds1.21.10
2 loader builds1.21.9
1 loader build1.21.8
2 loader builds1.21.7
2 loader builds1.21.6
2 loader builds1.21.5
2 loader buildsShowing the newest 12 of 29 game versions. Older files are in the list below.
Made local changes? Try them in a copied instance before touching a world you care about.
Recent files
Optimization versions and loaders
Looking for an older file? The official Modrinth project page is in Resources.