Chlorophyll
by Ghost
Chlorophyll is a server-side Fabric optimization that moves world ticking onto asynchronous threads, targeting the 1.21.4 – 1.21.7 range.
What it does
Chlorophyll brings asynchronous world ticking to Minecraft servers, so chunk and entity work can be spread across threads instead of running on one main loop. Its aim is to reduce the time a server spends per tick on busy worlds. The mod depends on Moonrise, which supplies the lighting and chunk groundwork it builds on, along with Fabric API and Cloth Config API.
Only the server needs Chlorophyll: players join a server that runs it without installing anything. Fabric 1.21.4 is the earliest release line with files, and the newest is 1.1.0 for 1.21.7, published on 2025-07-11. Files exist for 1.21.4, 1.21.5 and 1.21.7, so builds for 1.21.6 are not offered. The project is released under a custom license and is not open source, though its source code and issue tracker are public.
Key features
Asynchronous world ticking
World ticking is moved off the main thread, which lets the server process more of its per-tick work in parallel.
Moonrise integration
The mod is built to run alongside Moonrise, which its installation steps treat as a required companion.
Server-only operation
Clients keep their vanilla setup, so the changes take effect on the host without any player-side install.
Public source and tracker
The source code and issue tracker are publicly linked, so changes and bug reports can be followed by server owners.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 3
Use cases
Who it’s for: Server owners running Fabric 1.21.4 – 1.21.7 who want asynchronous world ticking and are willing to install Moonrise, Fabric API and Cloth Config API alongside it. Players need nothing extra.
How it compares
Moonrise Compats is a Fabric and NeoForge mod for 1.21.1, required on the server while clients stay optional; its license is the GNU General Public License v3.0 only. The Block Keeps Ticking is server-side only on Fabric for 1.21.6 – 26.2 under the MIT License. Async Hotbars is client-side only on Fabric for 1.21.5 – 26.3 under the GNU General Public License v3.0 only, so it works on a different side of the connection.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Chlorophyll | Fabric | 1.21.4 – 1.21.7 | Server-side only | 2025-07-11 |
| Moonrise Compats | Fabric and NeoForge | 1.21.1 | Server required, client optional | 2026-01-17 |
| The Block Keeps Ticking | Fabric | 1.21.6 – 26.2 | Server-side only | 2026-08-12 |
| Async Hotbars | Fabric | 1.21.5 – 26.3 | Client-side only | 2026-10-08 |
Questions
Does Chlorophyll need Moonrise?
Do players have to install Chlorophyll?
Which game versions have files?
Under what license is Chlorophyll released?
In the catalog
Chlorophyll is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 13,697 mods support Minecraft 1.21.7.
More from Ghost
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/chlorophyll
- Owner
- Ghost
- Published
- 2024-12-31
- Updated on Modrinth
- 2025-07-11
- Facts verified
- 2026-10-15