ModsFinder

FerriteCore

by malte0811

FerriteCore lowers the memory the game uses by storing block states and models more compactly, on the client and on servers.

FabricForgeNeoForgeQuiltClient or server, optionalMIT LicenseOpen source1.16.5 – 26.3

What it does

FerriteCore changes how the game keeps some of its internal data in memory, so the same pack needs less heap space. How much it saves depends on the mods installed. As an example from the author, one test pack dropped from 1,792 MB to 984 MB of heap in a world made from a fixed seed.

Some of its changes only matter on the client, but several of the larger ones also apply to a server, so the author recommends installing it on both sides. Either side can run it, and neither needs it. Its code is open source under the MIT License, with builds for Fabric, Forge, NeoForge and Quilt across 33 release versions, covering 1.16.5 – 26.3.

Key features

  1. Lower heap use

    Internal game data is stored in more compact structures, reducing the memory a modpack occupies after loading.

  2. Gains on servers too

    Several high-impact changes help dedicated servers too, not only the game client.

  3. No new content

    The mod adds no blocks, items or settings to manage; it only changes memory layout behind the scenes.

  4. Four loaders

    Files exist for Fabric, Forge, NeoForge and Quilt; the latest Fabric and NeoForge builds, 9.0.0, target 26.3.

Compatibility

Latest build for each game version and loader.

26.x5 of 5 versions with builds
26.39.0.0-fabricNot available9.0.0-neoforgeNot available
26.29.0.0-fabricNot available9.0.0-neoforgeNot available
26.1.29.0.0-fabricNot available9.0.0-neoforgeNot available
26.1.19.0.0-fabricNot available9.0.0-neoforgeNot available
26.19.0.0-fabricNot available9.0.0-neoforgeNot available
1.21.x11 of 11 versions with builds
1.21.118.2.0-fabricNot available8.2.0-neoforgeNot available
1.21.108.1.0-fabricNot available8.1.0-neoforgeNot available
1.21.98.1.0-fabricNot available8.1.0-neoforgeNot available
1.21.88.0.4-fabricNot available8.0.4-neoforgeNot available
1.21.78.0.4-fabricNot available8.0.4-neoforgeNot available
1.21.68.0.4-fabricNot available8.0.4-neoforgeNot available
1.21.58.0.4-fabricNot available8.0.4-neoforgeNot available
1.21.47.1.3-fabricNot available7.1.3-neoforgeNot available
1.21.37.1.0-hotfix-fabricNot available7.1.0-neoforgeNot available
1.21.17.0.3-fabricNot available7.0.3-neoforgeNot available
1.217.0.0-fabricNot available7.0.0-neoforgeNot available
1.20.x6 of 6 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.x1 of 1 version with builds
ReleaseBetaAlphaNot available

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

Required by 1 mod

Ultimative FullBright1.20.1

How it compares

Full comparison

ModernFix is another open-source mod for both sides, under the GNU Lesser General Public License v3.0 only, with files for Fabric, Forge and NeoForge across 1.16.4 – 26.1.2. Memory Leak Fix uses the GNU Lesser General Public License v2.1 only and ends at 1.20.4.

ModLoadersGame versionsEnvironmentUpdated
FerriteCoreFabric, Forge, NeoForge and Quilt1.16.5 – 26.3Client or server, optional2026-03-24
ModernFixFabric, Forge and NeoForge1.16.4 – 26.1.2Client or server, optional2026-10-11
Memory Leak FixFabric, Forge and Quilt1.14.4 – 1.20.4Client or server, optional2024-01-06

Questions

Should FerriteCore go on the server?

The author recommends both sides, because some of the larger memory savings apply to servers as well as clients.

How much memory does it save?

It depends on the pack. In the author's test with a fixed world seed, heap use fell from 1,792 MB to 984 MB.

In the catalog

FerriteCore 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 malte0811

All projects
Control Engineering1.18.2 – 1.19.2ServerConfigCleaner1.13.2 – 1.21.4

Similar mods

Sodium1.16.3 – 26.3Iris Shaders1.16.5 – 26.3Entity Cullingb1.7.3 – 26.3ImmediatelyFast1.18.2 – 26.3Sodium Extra1.16.2 – 26.3More Culling1.18 – 26.3

What the author says

The amount of memory saved will depend on the pack. In version 2.5.9 of All Of Fabric 3 it reduces the RAM usage (heap size) from 1,792 MB to 984 MB. For comparison the same setup with Hydrogen instead of FerriteCore uses 1,335 MB. These values were measured after generating a world with a fixed seed and waiting for…
malte0811, on the Modrinth page

Official listing

Owner
malte0811
Published
2021-04-03
Updated on Modrinth
2026-03-24
Facts verified
2026-10-15

Tags

OptimizationUtility
Open on ModrinthCompare