CloudOpen 2022

As WebAssembly (WASM) is adopted in cloud-native applications, there are increasing demands to support JavaScript applications and libraries in WASM. That allows WASM runtimes, such as WasmEdge, to run serverless functions written in JavaScript and Node.js APIs. WasmEdge first wraps the C-based QuickJS interpreter in a Rust crate, and then compile it to WASM. The Rust crate allows developers to extend and enhance the JS interpreter to support ES6, CommonJS, and even NPM modules. It also enables developers to implement JavaScript APIs in Rust to improve performance. At deployment, WasmEdge can run as a secure container in k8s pods itself, as opposed to the heavyweight "Linux container + guest OS + node + v8" stack of JS tooling. Michael will walk you through the technical challenges and solutions to run JavaScript in WASM in this talk. Michael will present performance benchmarks and demonstrate complete examples running React SSR and Tensorflow inference in JS serverless functions.

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JavaScript in WebAssembly? Why and How

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