WASI 0.3 & Component Model: Polyglot Cloud-Native Wasm in 2026
Tech Radar: WASI 0.3 & Component Model: Polyglot Cloud-Native Wasm in 2026 Answer-First: The ratification of WASI 0.3 represents a watershed architectural milestone for cloud-native systems, introducing first-class asynchronous streaming (stream<T>, future<T>) directly into the WebAssembly Component Model. Powered by Wasmtime 46+ and Cranelift ahead-of-time (AOT) compilation, server-side Wasm delivers sub-millisecond cold starts (<1ms), 1–10MB memory footprints (60% lower than V8, 95% lower than Linux containers), and nanosecond-level inter-component IPC, establishing WebAssembly as the default execution sandbox for microservices, plugin extensions, and edge compute. ...