Chunk Sending Mod pre Minecraft 1.20.1, 26.3

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

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.