![FastFurnace [FABRIC]](https://cdn.modrinth.com/data/fZ3j1CdO/50df5dcb2b545043cec0b9c03d2f2b9ab62d0d21_96.webp)
About
This is an unofficial port of FastFurnace to Fabric for Minecraft 1.21+. The original mod was developed by shadows_of_fire for Forge/NeoForge.
FastFurnace utilizes mixins to edit the functionality of the Furnace, Blast Furnace, and Smoker, improving their TPS performance (not smelting speed!)
Similar to FastWorkbench, it caches the last recipe used, and checks this recipe first before re-scanning the entire registry. This is significantly faster due to the vanilla furnace scanning the entire furnace registry each tick, which may be fine for vanilla, but in a modded environment, gets very large very quickly.
These changes apply to the Furnace, Blast Furnace, and Smoker. Any mod utilizing AbstractFurnaceTileEntity will also receive the benefits of having this mod installed.
For people who like numbers, here is Vanilla vs FastFurnace. This is 9 furnaces each smelting cobblestone the entire time the test was conducted. The number of invocations is kept roughly the same as to not skew any numbers. This test was conducted in vanilla, which only has ~70 furnace recipes. In a modpack, there could be upwards of 700, significantly increasing the performance gain.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as FastFurnace-1.21.11-9.0.1.jar — drop this file into the mods folder
- Download size: 12 KB
- Download link checked 30 Aug 2026 — working
These come from our own check of the pack file, not from the source page.