ModsJava
XFermium
Java mod listed for Minecraft 1.16–1.21. Downloads from the MC Java Mods app on Android.
Lightweight optimization project that aims to optimize, fix/reduce lag and improve overal performance (FPS/TPS)
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Require FokusAPI to work correctly, please install it
Lightweight optimization project that aims to optimize, fix/reduce lag and improve overal performance (FPS/TPS)
Features
- Tweak multiple entities collision, collide rule
- Optimize player movements for server/client smoothness
- Faster Minecraft RB by making it running if it necessary, not too frequently
- Tweak some entities mechanic and optimize Experience Orbs entity for mobs farm, etc…
- Optimize minecraft's random tick speed & mods scheduling, reduce the latency - improve TPS
- Optimize & tweak item entities, espicially for some type of items with large quantity such as cobblestone,netherrack,etc… , greatly improve performance
- (This feature has been splitted into a standalone mod - Recommend to install with XFermium: Enhanced Item Entities
Comparison
Before
After
Incompatibility
None
Try my other mods
- Brutal Nightmare - Minecraft, but with insane difficulty. Zombie place/break blocks, throw TNT. Skeleton, Creeper, Ghasts, Spider,Phantom,… get new abilities.New mini bosses…
- Double Jump - Add Double Jump and Leap mechanic to minecraft with sneak button!
- Adrenaline Rush - Add "final shout" & "second chance" mechanic into minecraft! You'll have 0,5 HP instead of dying when fall from height ; Buff your power when you at low HP
- Wall Climbing - Add Wall Climb (Wall Jump) mechanic to minecraft
- Useful Snowball - Useful Snowball! Make snowball slow mob.
- AwfulLightning - Makes Lightning strucks on players more oftenly, can create fun & surprising deaths with lightning bolts!
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.16.3, 1.17.1, 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: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as XFermium-v1.1.5_MOD.jar — drop this file into the mods folder
- Download size: 202 KB
- Download link checked 3 Oct 2026 — working
These come from our own check of the pack file, not from the source page.