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Modrinth · Minecraft mod
Command Optimiser
Reduces performance impact of command blocks by caching parsing results.
Choose a version Pick your version below, then grab the matching file.
Quick answer
Which Command Optimiser release matches 1.21.4 NeoForge?
Best match for your filters 1.0
Game version 1.21, 1.21.1, 1.21.2
Loader NeoForge
Command Optimiser 1.0 targets 1.21, 1.21.1, 1.21.2 with NeoForge. Do not install it on the client. It must be installed on the dedicated server. No extra mods listed for this file.
Where it goes
Is Command Optimiser required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
Client Not supported
Dedicated server Required
Loader for this release NeoForge
Required install it here Optional supported, not mandatory Not supported do not install here Source doesn’t say do not assume
This file is marked server-only.
What else does Command Optimiser 1.0 need?
1.0 on 1.21.4 NeoForge. 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 Command Optimiser without breaking your instance.
Built for Command Optimiser 1.0 on 1.21.4 NeoForge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0. It targets 1.21, 1.21.1, 1.21.2 with NeoForge; 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
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0. It opens that exact file at the source.
About this project
What does Command Optimiser add?
Command Optimiser
Reduces performance impact of command blocks by caching parsing results.
How it works
When running command blocks, the game parses the command text every time it is run. This takes up a lot of redundant processing time. Instead if the results of parsing are stored in memory we can speed up command execution. The command only needs to be parsed again when it is changed.
Expected performance improvements
Depending on the number of command blocks you use, the performance gains may vary.
You can safely expect that the TPS impact of command blocks will reduce by at least 10-20%. Gains will likely be smaller for commands that affect blocks than other, less intensive commands.
Testing with real-world command usage on a creative server showed a reduction of about 30% (overall 3-4% of server busy time).
Project description from Modrinth.
Pick your setup
Command Optimiser by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Minecraft version
26.1.1
3 loader buildsMinecraft version
26.1
3 loader buildsMinecraft version
1.21.11
3 loader buildsMinecraft version
1.21.10
3 loader buildsMinecraft version
1.21.9
3 loader buildsMinecraft version
1.21.8
2 loader buildsMinecraft version
1.21.7
2 loader buildsMinecraft version
1.21.6
2 loader buildsMinecraft version
1.21.5
2 loader buildsMinecraft version
1.21.4
2 loader buildsMinecraft version
1.21.3
2 loader buildsShowing the newest 12 of 15 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Command Optimiser versions and loaders
1.0
commandoptimiser-neoforge-1.0.jar
28 Sept 2025
Client Not supported Server Required Dependencies No extras listed Listed on Release listing
Check the 1.21.4 · NeoForge setup 1.211.21.11.21.21.21.3 release
Looking for an older file? The official Modrinth project page is in Resources.