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CurseForge · Minecraft mod
Immersive Optimization
A lightweight entity-tick-scheduler for doubling your TPS.
Choose a version Pick your version below, then grab the matching file.
Quick answer
Which Immersive Optimization release matches 1.21.1 Forge?
Best match for your filters [Forge 1.21.1] Immersive Optimization - 0.2.0
Game version 1.21.1
Loader Forge
Immersive Optimization [Forge 1.21.1] Immersive Optimization - 0.2.0 targets 1.21.1 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
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.
Client Source doesn’t say
Dedicated server Source doesn’t say
Loader for this release Forge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume
The source does not explicitly classify this release as client-only or server-only.
What else does Immersive Optimization [Forge 1.21.1] Immersive Optimization - 0.2.0 need?
[Forge 1.21.1] Immersive Optimization - 0.2.0 on 1.21.1 Forge. Every mod below is checked against that same setup.
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 Immersive Optimization without breaking your instance.
Built for Immersive Optimization [Forge 1.21.1] Immersive Optimization - 0.2.0 on 1.21.1 Forge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use [Forge 1.21.1] Immersive Optimization - 0.2.0. It targets 1.21.1 with Forge; 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
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 [Forge 1.21.1] 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
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.
Minecraft version
26.1.2
2 loader buildsMinecraft version
1.21.11
3 loader buildsMinecraft version
1.21.1
3 loader buildsMinecraft version
1.21
3 loader buildsMinecraft version
1.20.1
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
[Forge 1.21.1] Immersive Optimization - 0.2.0
immersive_optimization-forge-1.21.1-0.2.0.jar
14 Jul 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · Forge setup Forge1.21.1 release
[Forge 1.21] Immersive Optimization - 0.1.6
immersive_optimization-forge-1.21-0.1.6.jar
8 Jun 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · Forge setup 1.21Forge1.21.1 release
[Forge 1.21] Immersive Optimization - 0.1.5
immersive_optimization-forge-1.21-0.1.5.jar
14 May 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · Forge setup 1.21Forge1.21.1 release
[Forge 1.21] Immersive Optimization - 0.1.4
immersive_optimization-forge-1.21-0.1.4.jar
1 Mar 2026
Client Source doesn’t say Server Source doesn’t say Dependencies No extras listed Listed on Release listing
Check the 1.21.1 · Forge setup 1.21Forge1.21.1 release
Looking for an older file? The official CurseForge project page is in Resources.