Async is currently in alpha testing and is experimental. Its use may lead to incorrect entity behavior and crashes.
Async is a Fabric mod that enhances the performance of entity processing. The mod leverages multithreading, which allows multiple CPU cores to improve performance when handling a large number of entities.
- ⚡ Improved TPS: Maintains stable tick times even with a large number of entities.
- 🚀 Multithreading: Utilizes multiple CPU cores for parallel entity processing.
| Configuration | TPS | MSPT |
|---|---|---|
| Lithium + Async | 20 | 41.8 |
| Lithium (without Async) | 4.4 | 225.4 |
| Purpur | 5.72 | 176.18 |
- Processor: AMD Ryzen 9 7950X3D
- RAM: 64 GB (16 GB allocated to the server)
- Minecraft Version: 1.21.4
- Number of Entities: 9000
- Entity Type: Villagers
Mod List
Concurrent Chunk Management Engine, Fabric API, FerriteCore, Lithium, ScalableLux, ServerCore, StackDeobfuscator, TT20 (TPS Fixer), Tectonic, Very Many Players, Fabric Carpet.
/async config toggle— Enables or disables the mod in-game (no server restart required). Use this command to instantly see how Async improves your server./async config setEntityMoveSync— Disables parallel processing of entity movement. Useful for preventing potential synchronization with vanilla logic (disabled by default). Always enabled for items./async config setDisableTNT— Enables or disables parallel processing of TNT. (Disabled by default as the feature is unstable)./async stats— Displays the number of threads in use./async stats entity— Shows the number of entities processed by Async in various worlds.
The mod is available on Modrinth
Full support is provided only for the latest version of Minecraft. Older versions receive critical fixes only. Support for older Minecraft snapshots is not planned.
Our tracker for feedback and bug reports is available on GitHub:
You can also chat with us on Discord:
This mod is based on code from MCMTFabric, which in turn was based on JMT-MCMT. Huge thanks to Grider and jediminer543 for their invaluable contributions!