9 releases (4 breaking)

0.6.1 Feb 18, 2020
0.6.0 Feb 5, 2020
0.5.1 Jan 24, 2020
0.4.3 Jan 24, 2020
0.2.1 Oct 14, 2019

#5 in #lucet

Download history 22/week @ 2024-01-22 8/week @ 2024-02-19 109/week @ 2024-02-26 24/week @ 2024-03-04 17/week @ 2024-03-11 13/week @ 2024-03-18

163 downloads per month
Used in 10 crates (8 directly)

Apache-2.0 WITH LLVM-exception


Lucet has reached End-of-life

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.

Lucet   Build Status

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).


Common types for representing Lucet modules.

These types are used both in lucetc and lucet-runtime, with values serialized in bincode format to the compiled Lucet modules.


~146K SLoC