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Emscripten

1 post about Emscripten. Every summary links to the original.

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Cloudflare
Supporting native Rust in Workers with the new Emscripten target for wasm-bindgen
Cloudflare announced an experimental Emscripten target for wasm-bindgen, enabling native Rust code compiled with wasm-bindgen to run directly on Workers with full platform feature virtualization. This resolves the long-standing incompatibility between Emscripten and wasm-bindgen by having Emscripten drive the build while wasm-bindgen produces portable bindings included in Emscripten’s library system. The integration virtualizes timers, file system operations, and sockets atop Workers’ Node.js APIs, bringing significantly improved library compatibility for many previously unsupported Rust crates after minor patches to libraries like libc and socket2. Tokio async runtime support is achieved through WebAssembly JavaScript Promise Integration, which suspends blocking calls and returns control to the event loop without stalling. In testing, a Rust Minecraft server (Pumpkin) was deployed inside a Durable Object with TCP ingress using real Tokio sockets, persisting world state through Durable Object storage and supporting multiplayer connections.

The best engineering reads, once a week.

Topic

1 post about Emscripten. Every summary links to the original.

Paid picks we use ourselves. Links carry a referral code — a subscription through one earns us a commission at no extra cost to you.

Newest first

Cloudflare
Supporting native Rust in Workers with the new Emscripten target for wasm-bindgen
Cloudflare announced an experimental Emscripten target for wasm-bindgen, enabling native Rust code compiled with wasm-bindgen to run directly on Workers with full platform feature virtualization. This resolves the long-standing incompatibility between Emscripten and wasm-bindgen by having Emscripten drive the build while wasm-bindgen produces portable bindings included in Emscripten’s library system. The integration virtualizes timers, file system operations, and sockets atop Workers’ Node.js APIs, bringing significantly improved library compatibility for many previously unsupported Rust crates after minor patches to libraries like libc and socket2. Tokio async runtime support is achieved through WebAssembly JavaScript Promise Integration, which suspends blocking calls and returns control to the event loop without stalling. In testing, a Rust Minecraft server (Pumpkin) was deployed inside a Durable Object with TCP ingress using real Tokio sockets, persisting world state through Durable Object storage and supporting multiplayer connections.

The best engineering reads, once a week.