Minecraft Forge: Performance mods

If your Forge server is lagging, struggling with TPS drops, or using more RAM than it should, performance mods can help. These mods optimize how the game runs without changing gameplay, and most of them are server-side, so you can add them on top of an existing modpack.

Back up first. AleForge recommends making a backup of your server before installing any additional mods.

Recommended Performance Mods

Mod	What It Does
FerriteCore	Reduces the amount of RAM Minecraft uses by making its memory usage more efficient. A good starting point for almost any Forge server.
Performant	Reduces the overhead of mob AI, so the server spends less time calculating what mobs are doing. Especially helpful on worlds with a lot of mobs and mob farms.
AI Improvements	Optimizes how efficiently mob AI calls reach the CPU. Works alongside Performant to further reduce the cost of mob behavior.
MCMT	Adds multithreading support to more of Minecraft’s processes, letting the server spread work across multiple CPU cores instead of relying on a single one.
FastWorkbench	Improves TPS by optimizing how crafting tables handle recipe lookups, which helps on servers with a lot of automated crafting.
FastFurnace	Improves TPS by optimizing how furnaces process smelting, which helps on servers running large furnace arrays.
Get It Together, Drops!	Optimizes how dropped items merge with each other, so large piles of dropped items cost the server less to process.

How to Install

You can install these mods in two ways. Option A is the easiest.

Option A: Install from the Panel (Depot)

1. Log in to your panel and open your server.
2. Open the Depot section.
3. At the top, open the Mods section.
4. In the filter, select your server’s Minecraft version. Use the exact version your server is running, so you only see mods that are compatible.
5. Find the mod you want (for example, FerriteCore or Performant) and click Install.
6. Repeat for each mod on this list that you want to add.
7. Restart your server so the mods load.

This installs the mod with one click, in the right version for your server, without you needing to download or upload anything yourself.

Option B: Upload the Files Manually

1. Download the correct mod version for your Minecraft version and mod loader (Forge) from CurseForge.
2. Back up your server.
3. Stop the server.
4. Open the File Manager and go into the mods folder.
5. Upload the .jar file for each mod.
6. Start the server and check the console to make sure every mod loaded without errors.

Install mods one at a time if you can, and restart between each one. This makes it much easier to tell which mod is responsible if something goes wrong.

A Few Tips

• Match your Minecraft version. Always download the build made for your exact server version. Some of these mods are only available for older Forge versions, so check the mod page before installing.
• Check for conflicts with existing modpacks. Some large modpacks already include one or more of these mods, or a mod that does something similar. Installing a duplicate can cause conflicts, so check your modpack’s mod list first.
• Start with FerriteCore and Performant. These two give the broadest improvement for most servers. Add the rest based on the specific bottleneck you’re trying to fix, such as mob-heavy farms or large automated crafting setups.
• Test after each change. Performance mods are generally safe, but conflicts between mods can happen. Keep an eye on your console log and your TPS after installing anything new.