Mod LazyDFU

LazyDFU, faster Minecraft startups

LazyDFU is a lightweight optimization mod for Minecraft that speeds up game and Minecraft server startup by postponing the heavy DataFixerUpper process. Instead of compiling every world conversion rule during launch, it defers this work until an older world actually needs upgrading, which often cuts loading times significantly without changing gameplay or world data.

Compatible with many Java versions and both client and serveur Minecraft environments, LazyDFU runs quietly in the background and typically needs no configuration. On our BoxToPlay infrastructure, it is an ideal companion for performance focused modpacks where faster restarts and smoother testing cycles really matter.