Very Many Players (Fabric)

Very Many Players

A Fabric mod designed to improve server performance at high playercounts.

VMP is still in early development and things are expected to break. Please report any issues to our issue tracker.

So what is VMP?
Very Many Players, or VMP for short, is a Fabric mod designed to improve general server performance at high playercount
without sacrificing vanilla functionality or behavior.
For the best performance it is recommended to use VMP with Lithium.

How VMP achieves its performance improvements?

Server-side game logic performance improvements:
- Uses area maps to optimize nearby packet sending and player lookups
- Uses cache to optimize entity trackers, fluid state lookups and ingredient matching
- Optimizes entity iteration for collisions
- Optimizes ticket propagator using MCUtil from the Paper project (patch licensed under MIT)

Client-side game logic performance improvements:
- Makes time source to use built-in Java time source instead of GLFW via JNI calls

Networking performance & responsiveness improvements:
- Uses our own chunk sending mechanism (optionally with packet-level rate-limiting)
- Adds packet-level per-player render distance
- Makes vanilla tcp connections more responsive using packet priority from raknetify
(works best when the server is connected without reverse proxies such as velocity and ssh port forwarding)

... and more

Support
Our issue tracker: link
Our discord server: link

More information
Check out the README\.md here: https://github.com/RelativityMC/VMP-fabric

ABOUT THIS LISTING

This page describes Very Many Players (Fabric) by ishland. The description and screenshots are the author's own, imported from their listing on Modrinth on 26 October 2026: https://modrinth.com/mod/vmp-fabric

Mythiq.net hosts no files for it. The download button goes straight to the release file on cdn.modrinth.com, so you are downloading from the author's own host, not from a copy of ours.

The download count, rating and comments on this page start at zero and count Mythiq.net only. The source's own figures are not copied here — they measure a different site, and a number that cannot be checked against our own ledger is not worth printing.

MOD LOADER

This release is built for Fabric. A mod built for one loader will not load under another — Fabric mods do not run on Forge, and vice versa.

GAME VERSION

Built for Minecraft 26.3. Minecraft mods are tied to an exact version: a 1.21.4 build will refuse to load on 1.21.5.

DEPENDENCIES

Check the author's listing for required libraries before you start the game — a missing dependency shows up as a crash on launch, not as a warning.

1. Install Fabric for the Minecraft version you play, if you have not already.

2. Download the .jar with the button on this page. Do not unzip it — a mod jar is installed as it is.

3. Put it in your mods folder:

Windows — %APPDATA%\.minecraft\mods

macOS — ~/Library/Application Support/minecraft/mods

Linux — ~/.minecraft/mods

4. Launch the game with the Fabric profile selected.

ON A SERVER

Anything that changes world generation or gameplay has to be installed on the server as well as on every client. Client-side visual and interface mods do not.

UPDATING

Replace the old .jar rather than adding the new one beside it. Two versions of the same mod in the folder is a crash on launch.