Lucet has reached end-of-life, and maintence has ceased. All Lucet users should transition to Wasmtime.

In mid-2020, the Lucet team switched focus to working on the Wasmtime engine. We have added all of the features to Wasmtime which previously only Lucet had, such as ahead-of-time (AOT) compilation and a pooling userfaultfd-based memory allocator.

A Bytecode Alliance project

Lucet is a native WebAssembly compiler and runtime. It is designed to safely execute untrusted WebAssembly programs inside your application.

Check out our announcement post on the Fastly blog.

Lucet uses, and is developed in collaboration with, the Bytecode Alliance's Cranelift code generator. It powers Fastly's Compute@Edge platform.

Lucet's documentation is available at https://bytecodealliance.github.io/lucet (sources).