Graal
High performance JavaScript runtime, tweaked for Minecraft usage
About this Mod
Graal
is a customized version of GraalJS, a high performance JavaScript implementation. It is ECMAScript-compliant, provides interoperability with Java and other Graal languages.
On top of regular GraalJS features, Graal made these improvements:
- MemberRemapper support, allowing developers to customize the JavaScript side name of a Java member, like Method and Field
- Trimmed bundled libraries, making the total mod size ~50% smaller than regular GraalJS
GraalJS Documentation: https://www.graalvm.org/reference-manual/js/
Attention
- This is NOT GraalJS or GraalVM. If you encounter issues that are not related to JavaScript itself, send issues to GraalMC GitHub repo before contacting GraalJS or GraalVM
- (Fixed in 25.0.2.0) If you are running the game with GraalVM, the game will crash early
Available Versions
How to Install Graal 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 (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Graal". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 26.1.1, 26.1 (+3 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Graal 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 (26.1.2). You can switch loaders with one click in the panel.
Is Graal compatible with fabric and forge and neoforge?
Graal officially supports fabric, forge, neoforge for Minecraft 26.1.2, 26.1.1, 26.1. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Graal – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Graal 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.
Rent Modded Server
Install Graal with just one click on your server.