Fast Noise
With Fast Noise installed on a server, the vanilla world generator produces overworld, nether and end chunks through a faster storage path, and players see no change in the terrain itself.
What it does
Fast Noise is a server-side optimization mod for world generation. It replaces the population of noise and biome data in NoiseChunkGenerator and the surface builder in SurfaceBuilder, so block and biome storage stays in chunks for the length of the generation step. Its authors describe it as keeping vanilla parity, including with datapacks, although vanilla itself is not fully deterministic.
The mod works by assuming how world generation behaves and using packed, cheaper calculations in place of the generic and debug storage code. Methods it relies on include reducing allocations, avoiding palette resizing, delaying and packing block counts, precalculating data and caching block state information. The author reports roughly 10 to 18 percent faster overworld generation on 1.21.11 and larger gains in the nether and end, with a JMH benchmark published alongside the claim.
Fast Noise requires ZConfig. Material Rule Compiler is optional. The mod is published for Fabric, Forge, NeoForge and Quilt across 29 release versions, 1.19 – 26.3, and snapshot builds are published too. It is released under the Mozilla Public License 2.0, so it is open source.
Key features
Packed world storage
Block and biome data is stored in a packed form during generation rather than through the generic vanilla containers.
Fewer allocations
Several generation steps reduce object allocations and avoid resizing palettes while a chunk is being built.
Cached block state data
Block state information is cached and block counting is delayed and packed, which cuts repeated work in each chunk.
Datapack parity
The author states that output matches vanilla, including worlds that use datapacks, and that compatibility-sensitive optimizations are off by default.
Gallery
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 1
Use cases
Server world pre-generation
Server owners who generate large areas ahead of players can expect the chunk pipeline to finish sooner.
Nether and end exploration
The larger reported gains in the nether and end suit servers where players travel to those dimensions often.
Who it’s for: Server owners who run Fabric, Forge, NeoForge or Quilt and want faster world generation. Players do not need the mod on their own client, since it is server-side only.
How it compares
Noisiumed is a server-side mod under the GNU General Public License v3.0 only, published for Fabric, Forge and NeoForge across 1.20 – 1.21.6, so it covers an older range than Fast Noise. NoiseThreader is server-side only, works on Forge for 1.12.2, is not open source and is under All rights reserved. NoisiumForked is server-side only, open source under the GNU Lesser General Public License v3.0 only, and published for Fabric and NeoForge across 1.21 – 26.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Fast Noise | Fabric, Forge, NeoForge and Quilt | 1.19 – 26.3 | Server-side only | 2026-10-10 |
| Noisiumed | Fabric, Forge and NeoForge | 1.20 – 1.21.6 | Server-side only | 2026-07-21 |
| NoiseThreader | Forge | 1.12.2 | Server-side only | 2026-01-25 |
| NoisiumForked | Fabric and NeoForge | 1.21 – 26.2 | Server-side only | 2026-05-30 |
Questions
Does Fast Noise need ZConfig?
Will Fast Noise change the terrain that generates?
Is Fast Noise compatible with AntiXray or Moonrise?
Will Fast Noise be backported to older versions?
In the catalog
Fast Noise is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 8,071 mods support Minecraft 26.3.
More from Reverie Projects
Similar mods
What the author says
Keep Android Open | Contact Regulators to stop Google's lockdown of Android Fast Noise is a modern optimization mod to improve world generation times. I regularly update the mod to latest minecraft versions, bring improvements to the mod, and provide stable releases.
Official listing
- Modrinth page
- modrinth.com/mod/zfastnoise
- Owner
- Reverie Projects
- Published
- 2025-12-13
- Updated on Modrinth
- 2026-10-10
- Facts verified
- 2026-10-15