Thread Tweak — Guide
What You Can Change
Thread Tweak exposes two kinds of settings:
| Setting | What it does |
|---|---|
| Thread count (main) | How many background worker threads Minecraft's main pool uses |
| Thread priority (main) | The OS priority of those background worker threads |
| Thread priority (io) | The priority of the input/output (file) worker threads |
Lowering the worker priority makes Minecraft yield CPU time to other programs more readily, while changing the thread count controls how much of the CPU the background pool can use at once.
Tuning Tips
- On a many-core CPU, the defaults are usually fine; the mod mainly helps if you want the game to be a background task while doing other things.
- To make Minecraft less greedy with the CPU, keep the worker priority low (the default is already 1) so other apps stay responsive.
- If you see stutters while lots of chunks are generating, experimenting with the main thread count can help balance throughput against smoothness.
- Changes only apply on game start, because the worker pools are built once, very early in loading.