FastMathFabric
This mod changes math to replicate OptiFine's Fast Math feature
About this Mod
FastMathFabric replicates OptiFine's Fast Math feature as a Fabric mod. It is incompatible with Lithium and OptiFabric.
Note: the "SmallAngleMath" file is even more cursed - instead of OptiFine's Fast Math, it replaces the math with the small-angle approximation (sin x = x, cos x = 1)
Available Versions
How to Install FastMathFabric on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.18).
Install Mod
Open the mod browser in the dashboard and search for "FastMathFabric". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.18, 1.17.1
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
FastMathFabric server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.18). You can switch loaders with one click in the panel.
Is FastMathFabric compatible with fabric?
FastMathFabric officially supports fabric for Minecraft 1.18, 1.17.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with FastMathFabric – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if FastMathFabric consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install FastMathFabric with just one click on your server.