Faster Random
Faster Random replaces the random number generators Minecraft uses during world generation and some client-side work, with the stated aim of speeding them up on slower generator types.
What it does
The mod targets the slower random generators in the game. According to its author, the replacement applies to structure placement and generation, feature and carver placement and generation, and some client-side tasks such as dropped items. Generators that are already fast are left unchanged.
The mod is archived as of 2025-12-27 and receives no updates. The author says it should only be used with worlds that were already generated with Faster Random, so that vanilla parity is kept, and that any speed gain may be small, situational or unmeasurable. Files exist for Fabric, NeoForge and Quilt, covering 1.19 – 1.21.1. Either side can run it, and neither needs it. The code is under the Apache License 2.0, so it is open source.
Key features
Faster slow generators
Replaces the slower random generators with faster ones for work that Minecraft performs during world generation.
Structure and feature placement
Applies the replacement to structure placement and generation, plus feature and carver placement and generation.
Dropped item handling
Includes some client-side random work, such as the placement of dropped items.
Benchmark testmod
A testmod runs a benchmark against each random method so the author's performance claims can be checked.
MC-239059 patch
Patches the MC-239059 bug, which the author describes as having little effect on gameplay.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x2 of 2 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.
Use cases
Existing Faster Random worlds
Worlds already generated with the mod can keep running it to preserve their generated content.
Performance testing
Server owners who want to measure the effect can run the included benchmark on their own hardware.
Who it’s for: Players and server owners with existing worlds generated by Faster Random who want to keep parity, and people who want to test the claimed speed gain on their own systems.
Questions
Does Faster Random still receive updates?
Is the speed gain reliable?
Which loaders does Faster Random support?
In the catalog
Faster Random is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from AnOpenSauceDev
Similar mods
What the author says
Faster Random has been archived as of 2025-12-27, and has not been publicly updated in over a year. This is because I've both heard of and gotten far too many conflicting results about this mod's performance, and feel as though this mod should not be relied on as a result. Any performance gain you notice could…
Official listing
- Modrinth page
- modrinth.com/mod/faster-random
- Owner
- AnOpenSauceDev
- Published
- 2023-06-29
- Updated on Modrinth
- 2024-07-23
- Facts verified
- 2026-10-15