Zefir's Optimizations Mod (1.21.1, 1.21) – Reduces Entity Lag
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
Zefir's Optimizations Mod is a performance mod that adds async entity movement using Akka actors. The overall working of the mod can get complicated, but…
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Zefir’s Optimizations Mod is a performance mod that adds async entity movement using Akka actors. The overall working of the mod can get complicated, but if you are looking forward to improving game performance by reducing the lag caused due to entities, this mod is a must have.
Features:
- Performance mod.
- Adds async entity movement using Akka actors.
Screenshots:
Zefir’s Optimizations Mod Download Links
For Minecraft 1.21.1, 1.21
Fabric version: Download from Server 1 – Download from Server 2
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.21
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as 177845.mcaddon
- Download size: 8.1 MB
- Download link checked 1 Aug 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.