ModsFinder

Ksyxis

by VidTu

Ksyxis is an optimization mod that removes chunks the game would otherwise load when a world is created or kept loaded in the background.

FabricForgeNeoForgeQuiltLegacy FabricOrnitheServer-side onlyMIT LicenseOpen source1.8 – 26.3

What it does

Minecraft loads some chunks at world creation, and in certain cases keeps them loaded while the player is elsewhere. The author describes these loads as either a one-time slowdown or a constant performance cost. Ksyxis disables the chunks that most players do not need, so the game has less to load and keep active. Server owners and single-player players gain the most from it, particularly on low-end hardware.

Because the mod turns off chunk loading, farms and technical contraptions that depend on those chunks can stop working. The author notes that removing the mod again restores the chunks. Ksyxis is released under the MIT License and is open source, with public source code, an issue tracker and a wiki.

Only the server needs it, and players join without installing anything. A server needs the mod; players joining a multiplayer server do not install it, and it has no effect on their client. In single-player the mod runs on the local game. The mod is published for several loaders, with game versions 1.8 – 26.3 and snapshot builds available.

Key features

  1. Disabled unneeded chunks

    Chunks that the game loads at world creation or keeps active in the background are turned off.

  2. Reduced load on low-end devices

    Fewer chunks to load lessens the work on machines with limited processing power.

  3. Single file for every loader

    One file covers all supported loaders, so no separate builds need to be chosen.

  4. Removable at any time

    Deleting the mod re-enables the chunks, which suits worlds that later need farms or contraptions.

Compatibility

Latest build for each game version and loader.

26.x5 of 5 versions with builds
26.31.4.61.4.61.4.61.4.61.4.61.4.6
26.21.4.61.4.61.4.61.4.61.4.61.4.6
26.1.21.4.61.4.61.4.61.4.61.4.61.4.6
26.1.11.4.61.4.61.4.61.4.61.4.61.4.6
26.11.4.61.4.61.4.61.4.61.4.61.4.6
1.21.x12 of 12 versions with builds
1.21.111.4.61.4.61.4.61.4.61.4.61.4.6
1.21.101.4.61.4.61.4.61.4.61.4.61.4.6
1.21.91.4.61.4.61.4.61.4.61.4.61.4.6
1.21.81.4.61.4.61.4.61.4.61.4.61.4.6
1.21.71.4.61.4.61.4.61.4.61.4.61.4.6
1.21.61.4.61.4.61.4.61.4.61.4.61.4.6
1.21.51.4.61.4.61.4.61.4.61.4.61.4.6
1.21.41.4.61.4.61.4.61.4.61.4.61.4.6
1.21.31.4.61.4.61.4.61.4.61.4.61.4.6
1.21.21.4.61.4.61.4.61.4.61.4.61.4.6
1.21.11.4.61.4.61.4.61.4.61.4.61.4.6
1.211.4.61.4.61.4.61.4.61.4.61.4.6
1.20.x7 of 7 versions with builds
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
1.17.x2 of 2 versions with builds
1.16.x6 of 6 versions with builds
1.15.x3 of 3 versions with builds
1.14.x5 of 5 versions with builds
ReleaseBetaAlphaNot available

This mod also publishes snapshot builds. Snapshots are not shown in the matrix.

27 older game versions (1.8 – 1.13.2) not shown. All files on Modrinth

Use cases

Low-end machines

A player on an older computer can reduce the chunk work the game performs during world loading.

Server owners

A server that does not need the extra chunks can run the mod to reduce the background load.

Who it’s for: Players on low-end hardware and server owners who do not depend on farms or contraptions that rely on the disabled chunks.

Questions

Does Ksyxis need Fabric API or Quilt Standard Libraries?

Not necessarily. The author states that the mod does not require either library, and one file covers every loader.

Does Ksyxis have to be installed on the client?

No. Only the server needs it, and players join without installing anything.

Why does Ksyxis report that no Mixin was found?

On Forge 1.15.2 or older, a Mixin provider such as MixinBootstrap or UniMixins must be installed. On Forge 1.16 or newer and on the other loaders, no extra mod is needed.

How can chunks be force-loaded after the mod disables them?

In 1.13 or newer, the /forceload command loads individual chunks. Older versions need a separate mod that force-loads chunks.

In the catalog

Ksyxis 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.

Optimization mods3,545Fabric modsMods for 26.38,071

More from VidTu

All projects
In-Game Account Switcher1.7.10 – 26.3HCsCR1.16.5 – 26.3

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3FerriteCore1.16.5 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3

What the author says

Speed up your world loading by removing unneeded chunks. Depending on your game version, Minecraft loads some chunks when you create your world. Sometimes, these chunks are always loaded in the background. Either way, whether these chunks being loaded is a one-time performance slowdown, or a constant performance…
VidTu, on the Modrinth page

Official listing

Owner
VidTu
Published
2021-10-16
Updated on Modrinth
2026-10-08
Facts verified
2026-10-15

Tags

OptimizationUtilityWorld generationManagement
Open on ModrinthCompare