Memory Leak Fix

Memory Leak Fix

A mod that fixes multiple memory leaks in Minecraft. Both server-side & client-side

For the best performance & memory usage, I recommend using this mod with:
- lithium-fabric - The best general performance mod
- FerriteCore - Memory usage optimizations

My other optimizations/fixes
MoreCulling - Changes how blockstate culling is handled to improve performance
Carpet-Fixes - Largest Server-Side bug fixing mod
Blanket - Client-side tweaks/fixes
RailOptimization - Make powered rails less laggy

Minecraft 1.20.5+
All the memory leaks in minecraft previously fixed by MemoryLeakFix have been fixed. Making this mod obsolete in future versions of the game.

More Info

Feel free to contribute to the project!
I'm also fine if you use this mod in your modpacks, just make sure to mention it.

However I don't allow clients or other projects to merge this mod without permission, if you would like to use this mod in your client or another project please contact me.

ABOUT THIS LISTING

This page describes Memory Leak Fix by FX. The description and screenshots are the author's own, imported from their listing on Modrinth on 3 October 2026: https://modrinth.com/mod/memoryleakfix

Mythiq.net hosts no files for it. The download button goes straight to the release file on cdn.modrinth.com, so you are downloading from the author's own host, not from a copy of ours.

The download count, rating and comments on this page start at zero and count Mythiq.net only. The source's own figures are not copied here — they measure a different site, and a number that cannot be checked against our own ledger is not worth printing.

MOD LOADER

This release is built for Forge. A mod built for one loader will not load under another — Fabric mods do not run on Forge, and vice versa.

GAME VERSION

Built for Minecraft 1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4. Minecraft mods are tied to an exact version: a 1.21.4 build will refuse to load on 1.21.5.

DEPENDENCIES

Check the author's listing for required libraries before you start the game — a missing dependency shows up as a crash on launch, not as a warning.

1. Install Forge for the Minecraft version you play, if you have not already.

2. Download the .jar with the button on this page. Do not unzip it — a mod jar is installed as it is.

3. Put it in your mods folder:

Windows — %APPDATA%\.minecraft\mods

macOS — ~/Library/Application Support/minecraft/mods

Linux — ~/.minecraft/mods

4. Launch the game with the Forge profile selected.

ON A SERVER

Anything that changes world generation or gameplay has to be installed on the server as well as on every client. Client-side visual and interface mods do not.

UPDATING

Replace the old .jar rather than adding the new one beside it. Two versions of the same mod in the folder is a crash on launch.