ModsFinder

Xylene

by FiveNova

Xylene is a Fabric client-side optimization mod for Minecraft 1.21.11, currently a framework with placeholder mixins rather than working optimizations.

FabricClient-side onlyAll rights reserved1.21.11

What it does

Xylene is a Fabric mod for the client, so only the player's installation needs it and servers run without it. Its files target 1.21.11 alone, and the latest is 1.1.0, published 2026-05-21 on the alpha channel. Xylene is not open source, and all rights are reserved.

Key features

  1. Placeholder mixins

    About 40 mixins are registered as empty placeholders aimed at areas such as hopper, redstone, lighting and chunk loading.

  2. Framework without optimizations

    The optimization code itself has not been written yet, so the mod loads without changing gameplay or frame rate.

  3. Public issue tracker and wiki

    The author provides a public issue tracker and a wiki for reporting problems and reading documentation.

Compatibility

Latest build for each game version and loader.

1.21.111.1.0
ReleaseBetaAlphaNot available

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

How it compares

Full comparison

Smart Optimization and StackCluster Optimizer are both Fabric client-side mods for 1.21.11 under All rights reserved, neither open source. PerceptiFrame is also a Fabric client-side mod for 1.21.11, under the MIT License and not open source. Lazy Chunks and FPSFlow are open source Fabric client-side mods, with Lazy Chunks covering 1.21 – 1.21.4 and FPSFlow covering 1.21.11 – 26.2.

ModLoadersGame versionsEnvironmentUpdated
XyleneFabric1.21.11Client-side only2026-05-21
Smart OptimizationFabric1.21.11Client-side only2026-06-09
StackCluster OptimizerFabric1.21.11Client-side only2026-05-01
PerceptiFrameFabric1.21.11Client-side only2026-08-20
Lazy ChunksFabric1.21 – 1.21.4Client-side only2025-12-29
FPSFlowFabric1.21.11 – 26.2Client-side only2026-07-29

Questions

Does Xylene improve frame rate yet?

Not in the current release. The author notes that the optimization code has not been filled in, so the mixins are placeholders and do not change performance.

Does Xylene need to be installed on the server?

No. It is client-side only, so only the player's client needs the mod.

In the catalog

Xylene is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.

Optimization mods3,545Fabric modsMods for 1.21.1119,862

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

About 40+ other mixins are registered but are currently empty placeholders, things like hopper optimization, redstone optimization, lighting improvements, chunk loading tweaks, etc. The framework is there but the actual optimization code hasn't been filled in yet. They load harmlessly and do nothing.
FiveNova, on the Modrinth page

Official listing

Owner
FiveNova
Published
2026-03-22
Updated on Modrinth
2026-05-21
Facts verified
2026-10-15

Tags

Optimization
Open on ModrinthCompare