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Chunk Sending[Forge/Fabric] logo

Chunk Sending[Forge/Fabric]

Mod

by someaddon

Optimizes chunk packet delivery

Type

Mod

CurseForge Downloads

74,741,770

CurseForge ID

831663

Last Updated

Nov 7, 2026

Description

Optimizes chunk packet sending by prioritizing and distributing chunk delivery over time, reducing load on both servers and clients

  • Smoother server login, teleporting, respawning, and dimension changes by loading nearby chunks first
  • Less network strain by spreading chunk delivery over time, reducing bandwidth spikes and improving playability on slower connections
  • Configurable chunk send limits over time, both per player and server wide
  • Optional prioritization of chunks in the direction the player is facing

Additional optimizations:

  • Reuses constructed chunk packets when sending the same unchanged chunk to multiple players, reducing server overhead
  • Controls and staggers item-frame map updates, reducing traffic and processing spikes from large map displays

Mojang2020Logo.png Mojang later adopted a similar idea in Java Edition 1.20.2 by adding delayed chunk sending to the vanilla game. On modern Minecraft versions (1.21.1+), Chunk Sending builds on the vanilla implementation by exposing configurable limits and behavior, while older versions retain the mod’s original chunk-sending system.

Requires Cupboard dependency to be installed in newer versions

  • Per player and server wide chunk send limits
  • Client requested chunk rate and unacknowledged batch limits
  • Facing direction chunk prioritization
  • Singleplayer chunk batching
  • Chunk packet caching
  • Nearby and dimension wide itemframe map update rates
  • Debug logging

No known incompatibilities, should work fine with any mod.

Only required on serverside.

Compatibility

Mod Loaders

Fabric Server

Game Versions

26.3

Recommended Gear

Affiliate

Hardware and extras that pair well with this mod.

Mini PC for self-hosting

Mini PC for Self-Hosting

A low-power box that can sit in a cupboard and run a modded server around the clock.

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External Resources

CurseForge Source Code Issues