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Performance Tweaks Mod pour Minecraft 1.21.1, 1.21

Plusieurs optimisations et corrections de bugs. Correction des FPS de collision d'entités, Let-Me-Despawn, optimisation des rails et courant alternatif.

à partir de Lightning323 · CurseForge
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Mis à jour 18.10.2026
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About

Performance tweaks is a mod that contains several optimizations and fixes, ranging from entity optimizations to redstone. Post your thoughts in the comments, for new optimizations you would like to see!

From now on, I am bundling performance tweaks as a multi-platform mod, available for many Minecraft versions. Every optimization will be included, but there will be config options to disable some of them if you don't want them.

Config: (1.2.0+) All config files are now under config/perf-tweaks folder

Dependencies: Because this mod is now multi-platform, Architectury API is now a required dependency

This mod can just be installed on client and server, but works best when installed on both.

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Check out the wiki!

The wiki contains all information and help with this mod

Optimizations

Many of these optimizations are no longer updated to modern Minecraft versions, or have additional functionality / configure-ability.

Client Side Optimizations

  • Optimization to skip collision checks with many client side entities. (These checks are already handled by the server, reducing the strain on your client.)
  • Forked from Corgi_Taco's Entity Collision FPS Fix (Curseforge), (Github)
  • Super lightweight, so it should be compatible all mods.

Server Side Optimizations

Optimization to allow mobs with equipped items to despawn naturally. Preserves dropped items when mobs despawn (Configurable)

  • Forked from frikinjay's Let Me Despawn mod (Curseforge), (Github). Contains additional configuration options not present in the original mod
  • Lightweight tweak that should boost server performance if your world has lots of various entities.
  • Configurable mob exclusion list. To make a mob "persistent" just enter perf_tweaks persistence <mob-name>
  • If you don't want this optimization, Set "despawning.enable_despawning_optimization": false in the perf_tweaks.json in the configs.

Optimizations to reduce block updates and power calculations made to Redstone. (Configurable)

  • Forked from AC. Credit to SpaceWalkerRS for this fantastic mod: (Curseforge), (GitHub)
  • Designed to be minimally invasive to existing Minecraft code, so it shouldn't have any compatibility issues except maybe with mods that significantly alter Redstone.
  • If you don't want this optimization, Set "enable_alternate_current_by_default": false in the perf_tweaks.json in the configs. Additionally, you can disable alternate current for any world by typing command alternatecurrent off

Optimizations to speed up performance with powered rails. Replaces wasteful recursive method calling with a much faster check by a single powered rail.

  • Forked from the mod by FX_PR0CESS: (Curseforge), (Github). The original mod is no longer being updated.
  • This mod comprises 1 mixin, so there should be no compatibility issues

Comment installer Performance Tweaks

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.21–1.21.2 on Fabric, Forge or NeoForge automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Fabric, Forge or NeoForge

    The loader must match the game version of the mod file, for example Minecraft 1.21.2. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file performancetweaks-neoforge-1.2.0.jar (105 KB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: Performance Tweaks should be in the list.

Minecraft 1.21.2 runs on Java 21: with a different Java version the game may close right after launch.

Versions

Avec dépendances

MinecraftLoaderFichierDateActions
1.21Fabricperf_tweaks-fabric-1.21.1-1.3.082.9 Ko
1.21Forge, NeoForgeperf_tweaks-neoforge-1.21.1-1.3.080.6 Ko
1.21.2NeoForgeperformancetweaks-neoforge-1.2.0105 Ko

FAQ

Which Minecraft versions does Performance Tweaks work on?

There are files for 1.21.2, 1.21.1, 1.21. The newest is 1.21.2.

Is Performance Tweaks for Forge or Fabric?

There are files for Fabric: 1.21–1.21.1, for Forge: 1.21–1.21.1 and for NeoForge: 1.21–1.21.2.

Does Performance Tweaks need other mods?

The author lists no required dependencies: the Fabric, Forge or NeoForge loader is enough.

Which Java does Performance Tweaks need?

Minecraft 1.21.2 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

How do I download Performance Tweaks?

With Millida Launcher: it installs Performance Tweaks into a modpack by itself, for the right game version and loader. The launcher is free.

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