VectorX

Four independent kernels replace parts of the density array clamp, the per-element transform loop and related hot paths. Each kernel can be toggled on its own. The Vector API is an incubating JDK module that the JVM does not expose unless it is asked for, so the server must start with an added JVM argument in its launcher profile or start script. Without that flag the mod still loads and runs everything on the scalar backend, which gives no speedup.

Every vectorized kernel ships with a scalar twin. A per-call hook intercepts any failure and returns control to Mojang's own method, so a single failed call leaves the result unchanged. A startup correctness check disables the Vector API module on an unexpected CPU or on a conflicting mod, and vanilla behaviour is preserved in those cases. Startup logs report how many of the four kernels are active, for example 0/4 when the flag is missing.

Fzzy Config is required. The mod is published for Fabric only, with builds for 26.2 and 26.3, and the latest file is 0.2.0 for 26.3 on the beta channel. It runs on the server only, so players join without installing it. The source code is open source under the GNU Lesser General Public License v3.0 only.