Supporting native Rust in Workers with the new Emscripten target for wasm-bindgen

Today we’re announcing the first public experimental preview of a feature to better support native Rust code and even Tokio-based applications just running natively on Workers: first-class support for the Emscripten wasm32-unknown-emscripten Rust compiler target on the wasm-bindgen open source toolchain and Cloudflare’s Rust Workers.

wasm-bindgen is the open source toolchain powering Rust-based WebAssembly applications on our V8-based Workers Runtime. Enabling the Emscripten target for wasm-bindgen has been a long-term effort, first initiated by Google over a year ago, and then further reviewed and supported by the Cloudflare engineers maintaining wasm-bindgen.

While still in pre-release, we’re excited to share the new workflow possibilities this work enables in running native wasm-bindgen Rust applications with Emscripten on the web, Node.js, and on Cloudflare’s global Workers platform.