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Random Optimization

by colinxu2020

Random Optimization is a Forge and NeoForge mod that speeds up world loading, startup and several parts of the game that cost time at runtime.

ForgeNeoForgeClient or server, optionalGNU Lesser General Public License v3.0 onlyOpen source1.20.1 – 1.21.1

What it does

Its features target performance. Dropped items can be given a fixed spawn position, which keeps redstone contraptions predictable, and the DataFixerUpper is loaded lazily to shorten startup. A faster index for compressed resource packs and a faster structure locate step are also included. Each feature can be switched off in the configuration file.

The mod replaces the work of several older optimization mods, among them the shipwreck and buried treasure fixes and the boat break fix, so those need not be installed next to it. The 1.20.1 – 1.21.1 range covers 7 release versions, and the latest files are 1.7.5 for 1.20.6 on Forge and 1.7.5 for 1.21.1 on NeoForge, both dated 2026-09-23. The code is open source under the GNU Lesser General Public License v3.0 only.

Either side can run it, and neither needs it, so it may be added to a client, a server or both. Its source code and issue tracker are public.

Key features

  1. Fixed item drop positions

    Dropped items can be given a deterministic spawn position, which makes redstone builds with item drops behave the same way each time.

  2. Lazy DataFixerUpper loading

    The DataFixerUpper is deferred until it is needed, which shortens the time before the game window opens.

  3. Faster structure locating

    The structure locate step is sped up, an approach inspired by the MC-249136 work by bytzo.

  4. Compressed-pack index

    When enabled, a faster index for compressed resource packs replaces the default implementation, and the replacement used by Quick Pack is suppressed.

Compatibility

Latest build for each game version and loader.

1.21.1Not available1.7.5
1.20.61.7.5Not available
1.20.51.7.5Not available
1.20.41.7.5Not available
1.20.31.7.5Not available
1.20.21.7.5Not available
1.20.11.7.5Not available
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Questions

Which loaders does Random Optimization support?

Forge and NeoForge. Fabric and Quilt builds are not listed for this mod.

Does Random Optimization need to be installed on both sides?

No. It works on either side, and neither needs it, so it can be added to a client, a server or both.

Does the mod conflict with Quick Pack?

When the compressed-pack index is enabled, the mod suppresses the replacement used by Quick Pack and uses its own faster index instead.

In the catalog

Random Optimization is one of 3,545 Optimization mods on ModsFinder, and one of 1,441 Optimization mods for Forge. 32,366 mods support Minecraft 1.21.1.

Optimization mods3,545Forge modsMods for 1.21.132,366

More from colinxu2020

All projects
CMCompact Machines Infinite1.19.2 – 1.20.1WUWithFire Upgraded1.19.2

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What the author says

This mod implements the following features to significantly optimize game performance and fix existing bugs. All features can be toggled via the configuration file. This mod has good compatibility with other mods and has no known incompatibilities. It is open-source under the LGPL-3.0 license.
colinxu2020, on the Modrinth page

Official listing

Owner
colinxu2020
Published
2026-01-17
Updated on Modrinth
2026-09-23
Facts verified
2026-10-15

Tags

Optimization
Open on ModrinthCompare