JavaScript in WebAssembly? Why and How
summary
Claims JavaScript can run inside WebAssembly as a self-contained microservice runtime rather than a browser plugin. Uses QuickJS compiled to WebAssembly plus Rust host APIs to implement networking (non-blocking sockets), ES6/CommonJS support via Rollup, and TensorFlow inference bindings. Demos include React 18 streaming SSR and an image-recognition “hot dog” model and they work. Tradeoffs: QuickJS is roughly 3x slower than V8 but a WebAssembly image is ~10 MB versus ~1 GB for V8 in a container, and heavy paths move to Rust to regain performance.
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chapters (9)
- 0:00Start
- 0:23Javascript in Webassembly
- 1:07When Web Assembly Was Invented
- 5:45Smart Contracts
- 18:03A Rust Api That Allows Rust Developers To Write Javascript Apis
- 21:38Fetch Api
- 22:22Extension That Interact with Tensorflow
- 28:17Quickjs versus V8
- 32:44Spider Monkey
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