ChunkOptimizer
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on ModrinthChunkOptimizer
Save server resources by intelligently managing chunks based on where players are looking.
Servers waste resources loading chunks players can't see. A player looking north doesn't need chunks south of them fully processed. ChunkOptimizer cuts server chunk loading by up to 60% while keeping gameplay smooth with its buffer system.
ChunkOptimizer reduces server RAM and CPU usage by only loading and sending chunks that players can actually see. Chunks in the player's view direction are prioritized, while chunks behind them are kept as a buffer for instant access. Everything outside the view zone is aggressively unloaded.
Features
- View-based chunk loading - Only sends chunks within 120° of where the player is looking
- Buffer system - Keeps chunks behind the player in RAM for instant access when turning
- Percentage-based scaling - Automatically adjusts to each player's render distance (works with a render distance of 8 chunks or 32)
- Lightweight - Minimal performance impact, runs efficiently in the background
- Fully configurable - Active zone, buffer zone, update interval, and unload delay
Configuration
# % of render distance loaded in front of player
active-percent: 40
# % of render distance kept behind player as buffer
buffer-percent: 40
# Chunks kept loaded above/below player
vertical-limit: 4
# How often to update (ticks, 20 = 1s)
update-interval: 20
# Seconds before unloading unseen chunks
unload-delay: 5
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- 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 Modrinth — 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.
- Ships as ChunkOptimizer-1.0.0.jar — drop this file into the mods folder
- Download size: 8 KB
- Download link checked 25 Oct 2026 — working
These come from our own check of the pack file, not from the source page.