Legacy LazyDFU
Unofficial backport of LazyDFU for 1.13.2
About this Mod
This is an unofficial backport of LazyDFU for Legacy Fabric, specifically Minecraft versions 1.13.x
LazyDFU is an optimization mod for Minecraft that defers unnecessary initialization work so that it is only performed if required. Specifically, it makes the initialization of DataFixerUpper "lazy" - that is, it will not immediately create the rules required to migrate data from older versions of Minecraft to newer versions until it actually needs to do so.
The code of this backport is the same as LazyDFU 0.1.2, adjusted to legacy mappings.
For more information about how LazyDFU works, check out the official LazyDFU modrinth page, containing the 1.14+ releases, also consider supporting astei, the original creator of LazyDFU!
Available Versions
How to Install Legacy LazyDFU on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set legacy-fabric Loader
In the panel under "Egg", select the legacy-fabric loader and matching Minecraft version (1.13.2).
Install Mod
Open the mod browser in the dashboard and search for "Legacy LazyDFU". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.13.2, 1.13.1, 1.13
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Legacy LazyDFU server crashes on startup – what to do?
Most common cause: wrong legacy-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 (1.13.2). You can switch loaders with one click in the panel.
Is Legacy LazyDFU compatible with legacy-fabric?
Legacy LazyDFU officially supports legacy-fabric for Minecraft 1.13.2, 1.13.1, 1.13. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Legacy LazyDFU – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Legacy LazyDFU 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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Install Legacy LazyDFU with just one click on your server.