CurseForge · Minecraft mod
Immersive Optimization
A lightweight entity-tick-scheduler for doubling your TPS.
Quick answer
Which Immersive Optimization release matches Fabric?
Immersive Optimization [Fabric 26.2] Immersive Optimization - 0.2.0 targets 26.2 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Immersive Optimization required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Immersive Optimization [Fabric 26.2] Immersive Optimization - 0.2.0 need?
[Fabric 26.2] Immersive Optimization - 0.2.0 on Fabric. Every mod below is checked against that same setup.
Install Fabric API first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Immersive Optimization without breaking your instance.
Built for Immersive Optimization [Fabric 26.2] Immersive Optimization - 0.2.0 on Fabric. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use [Fabric 26.2] Immersive Optimization - 0.2.0. It targets 26.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside [Fabric 26.2] Immersive Optimization - 0.2.0. It opens that exact file at the source.
About this project
What does Immersive Optimization add?
Immersive Optimization
An entity tick scheduler to massively reduce lag (~200% speedup) and resource requirements of entities.
Unlike similar projects, this mod will not disable ticks all together, allowing farms or distant entities to still function.
Works great together with Entity Culling.
Discord
While tested thoroughly, I expect some rough edges. Please report any issues on GitHub or Discord.
Features
- Gradually slows down tick rate of entities and block entities
- Distributes updates over multiple ticks to flatten lag spikes
- Dynamically adjusts tick rate based on server load
- Configuration commands (
/io ...)
Tested Mod-Packs
Exact values change based on situations, but I observed:
- 150% higher performance in Cobblemon 1.20.1 Fabric
- 330% higher performance on a private 700 mods pack (Gallery example)

Immersive Collection
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Project description from CurseForge.
Pick your setup
Immersive 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 builds1.21.11
3 loader builds1.21.1
3 loader builds1.21
3 loader builds1.20.1
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Immersive Optimization versions and loaders
[Fabric 26.2] Immersive Optimization - 0.2.0
immersive_optimization-fabric-26.2-0.2.0.jar
14 Jul 2026
[Fabric 26.1.2] Immersive Optimization - 0.2.0
immersive_optimization-fabric-26.1.2-0.2.0.jar
14 Jul 2026
[Fabric 1.21.11] Immersive Optimization - 0.2.0
immersive_optimization-fabric-1.21.11-0.2.0.jar
14 Jul 2026
[Fabric 1.21.1] Immersive Optimization - 0.2.0
immersive_optimization-fabric-1.21.1-0.2.0.jar
14 Jul 2026
[Fabric 1.20.1] Immersive Optimization - 0.2.0
immersive_optimization-fabric-1.20.1-0.2.0.jar
14 Jul 2026
[Fabric 1.21] Immersive Optimization - 0.1.6
immersive_optimization-fabric-1.21-0.1.6.jar
8 Jun 2026
[Fabric 26.1.2] Immersive Optimization - 0.1.6
immersive_optimization-fabric-26.1.2-0.1.6.jar
8 Jun 2026
[Fabric 1.21.11] Immersive Optimization - 0.1.6
immersive_optimization-fabric-1.21.11-0.1.6.jar
8 Jun 2026
[Fabric 1.20.1] Immersive Optimization - 0.1.6
immersive_optimization-fabric-1.20.1-0.1.6.jar
8 Jun 2026
[Fabric 26.1.2] Immersive Optimization - 0.1.5
immersive_optimization-fabric-26.1.2-0.1.5.jar
15 May 2026
[Fabric 1.21.11] Immersive Optimization - 0.1.5
immersive_optimization-fabric-1.21.11-0.1.5.jar
14 May 2026
[Fabric 1.21] Immersive Optimization - 0.1.5
immersive_optimization-fabric-1.21-0.1.5.jar
14 May 2026
Looking for an older file? The official CurseForge project page is in Resources.