ModsFinder

Very Many Players (Fabric)

by ishland

Very Many Players reduces server load on busy multiplayer worlds by changing how packets, chunks and entity tracking are handled.

FabricServer required, client optionalMIT LicenseOpen source1.18 – 26.3

What it does

Installed on a server, the mod sends chunks through its own mechanism, with optional packet-level rate limiting. It adds per-player render distance at the packet level, so each connected player can receive a different view range. Area maps narrow the work for packet sending and player lookups to players who are actually nearby, and caches speed up tracking of entities and matching of recipe inputs.

On the client side the mod swaps the time source from GLFW calls through JNI to the Java runtime's own clock. For TCP connections, packet priority borrowed from raknetify makes vanilla networking more responsive, though the author notes this works more reliably without reverse proxies such as Velocity or SSH port forwarding. The mod requires Fabric API. Fabric is the only loader it targets, with 32 release versions published for 1.18 – 26.3 and open source code under the MIT License.

Key features

  1. Chunk sending mechanism

    Chunks are sent through the mod's own system, which can optionally apply packet-level rate limiting.

  2. Per-player render distance

    Render distance is set per player at the packet level, so each connected player can receive a different view range.

  3. Area maps and caches

    Area maps and caches cut down work for nearby packet sending, player lookups, entity trackers and ingredient matching.

  4. Entity collision iteration

    Entity iteration for collision checks is optimized to reduce the cost of crowded areas.

  5. Java clock for timing

    The client reads time from the Java runtime instead of calling GLFW through JNI.

Compatibility

Latest build for each game version and loader.

No stable releases
Every published file is a beta or alpha build.
26.x5 of 5 versions with builds
26.30.2.0+beta.7.238+26.3
26.20.2.0+beta.7.236+26.2
26.1.20.2.0+beta.7.234+26.1.2
26.1.10.2.0+beta.7.233+26.1.1
26.10.2.0+beta.7.232+26.1
1.21.x12 of 12 versions with builds
1.21.110.2.0+beta.7.227+1.21.11
1.21.100.2.0+beta.7.217+1.21.10
1.21.90.2.0+beta.7.212+1.21.9
1.21.80.2.0+beta.7.207+1.21.8
1.21.70.2.0+beta.7.202+1.21.7
1.21.60.2.0+beta.7.200+1.21.6
1.21.50.2.0+beta.7.198+1.21.5
1.21.40.2.0+beta.7.192+1.21.4
1.21.30.2.0+beta.7.181+1.21.3
1.21.20.2.0+beta.7.176+1.21.2
1.21.10.2.0+beta.7.172+1.21.1
1.210.2.0+beta.7.172+1.21.1
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
ReleaseBetaAlphaNot available

This mod also publishes snapshot builds. Snapshots are not shown in the matrix.

Required by 1 mod

Sable VMP Compatibility1.21.1

Use cases

High player count servers

Server owners running worlds with many simultaneous players can use the mod to reduce per-player networking and tracking work.

Who it’s for: Server owners who host many simultaneous players on Fabric. Players connecting to such a server get the client-side time source change when they also install the mod.

How it compares

Full comparison

Chunkumulator is server-side only, open source under the MIT License and published for 1.15 – 1.20.1 on Fabric, so it covers older versions than this mod. ModelEngine Client Optimization is client-side only and published for Fabric and NeoForge across 1.19.4 – 26.2, under a custom license that is not open source. Entity Collision FPS Fix is client-side only, open source under the CC0 1.0 Universal license and published for Fabric and Forge across 1.19 – 1.19.2.

ModLoadersGame versionsEnvironmentUpdated
Very Many Players (Fabric)Fabric1.18 – 26.3Server required, client optional2026-09-15
ChunkumulatorFabric1.15 – 1.20.1Server-side only2025-04-04
ModelEngine Client OptimizationFabric and NeoForge1.19.4 – 26.2Client-side only2026-06-22
Entity Collision FPS FixFabric and Forge1.19 – 1.19.2Client-side only2022-06-13

Questions

Does Very Many Players need Fabric API?

Yes. Installing it next to Very Many Players on the same Fabric setup is required for the mod to load.

Does the mod have to be installed on the client too?

No. The server must run it, while players may leave it out. Clients gain the time source change only when they also install the mod.

Why does the author suggest avoiding reverse proxies?

The raknetify-based packet priority works more reliably when the server is connected directly, without reverse proxies such as Velocity or SSH port forwarding.

Which versions are supported?

Release builds cover 32 versions published for 1.18 – 26.3, and snapshot builds are also published. Players on the alpha channel can use 0.2.0+beta.7.238+26.3 for 26.3, the newest Fabric file.

In the catalog

Very Many Players (Fabric) is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.

Optimization mods3,545Fabric modsMods for 26.38,071

More from ishland

All projects
Concurrent Chunk Management Engine (Fabric)1.17.1 – 26.3ScalableLux1.21 – 26.3Raise Sound Limit Simplified1.17.1 – 26.3Concurrent Chunk Management Engine (NeoForge)1.21.1 – 26.3Unsafe World Random Access Detector1.19 – 26.3Fix Keyboard on Linux1.18.2 – 1.21.11

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3FerriteCore1.16.5 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3

What the author says

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.
ishland, on the Modrinth page

Official listing

Owner
ishland
Published
2021-12-05
Updated on Modrinth
2026-09-15
Facts verified
2026-10-15

Tags

Optimization
Open on ModrinthCompare