LazyChunks
A Fabric client-side mod that reduces chunk loading stutters by dynamically spreading chunk processing across multiple frames based on your current FPS.
What It Does
LazyChunks monitors your real-time FPS and limits how much chunk work is processed each frame.
When FPS drops below a configurable threshold, chunk loading is slowed down instead of causing sudden frame drops. When FPS is high, chunks load faster to keep the world responsive.
This results in smoother gameplay, especially during fast movement, elytra flight, or exploration.
Configuration
Config file is created at .minecraft/config/lazy_chunks.json on first launch.
| Option | Default | Description |
|---|---|---|
| lazyChunkLoadingEnabled | true | Enable/disable the mod |
| targetFps | 60 | Baseline FPS for budget calculation |
| fpsThreshold | 80 | FPS above which throttling is disabled (vanilla behavior) |
| baseWeightPerFrame | 3.0 | Base amount of chunk work allowed per frame at target FPS |
| maxFrameTimePercent | 12.0 | Max percentage of frame time for chunk processing (1-20) |
| proactiveThrottling | true | Reduce budget when frame times are unstable |
| teleportProtection | true | Extra conservative throttling after teleports/dimension changes |
| minimumBudget | 3.0 | Minimum weight budget to prevent complete stalls |
Debug
Press F3 to see real-time throttling stats in the debug overlay.
Compatibility
Designed to work alongside Sodium, Lithium, and other optimization mods (different layers of the pipeline). If you encounter issues, please report them here.
License
Licensed under LGPL-3.0
- 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 lazy_chunks-2.0+mc1.21-1.21.4.jar — drop this file into the mods folder
- Download size: 39 KB
- Download link checked 30 Aug 2026 — working
These come from our own check of the pack file, not from the source page.