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Rust is a systems language pursuing the trifecta: safety, concurrency, and speed.

WebAssembly is a stack-based virtual machine and instruction set. It is fast, safe, portable, and part of the open Web platform. By compiling to WebAssembly, we can run Rust code on the Web!

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#RustWasm2019 Posts

Wasm at the 2019 Rust All Hands

The 2019 Rust All Hands meetup was in Berlin on February 4th through 8th. @ag_dubs, @alexcrichton, @fitzgen, and @yoshuawuyts from the Rust and WebAssembly working group all made it out to discuss some Wasm-related topics and plan for 2019.

We talked about:

  • The road to wasm-pack 1.0. This meeting was about trying to pin down what we want to ship as part of a wasm-pack 1.0 release, as well as crystallize wasm-pack’s ideal UX.

  • A modular toolkit for Wasm. There’s been a lot of talk in #RustWasm2019 posts and the 2019 roadmap RFC about building a modular toolkit for Wasm apps and libraries. This meeting was trying to dig a bit more into the details of what that entails. And naming, of course.

  • cargo build tasks, hooks, and/or post-build.rs for Wasm. Long-term (likely on the timeline of a couple years) we would like the experience of building Rust and Wasm projects to be exactly the same as building normal Rust projects: just cargo build and that’s it. But there is a bunch of stuff that needs to happen for Wasm after rustc emits a Wasm binary, such as generate JS bindings or run wasm-opt. This meeting was about how to add some sort of generic build hooks to cargo and turn wasm-pack into an implementation of those generic hooks specifically targeted for Wasm development.

  • Multithreading Wasm and rayon. This meeting was about how we take our experimental Wasm multithreading support and turn it into a reliable library that can serve as the foundation for multithreading on the Web. @CUViper from the rayon team also joined, and we made a plan for how to get rayon working in Wasm.

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