Practical Polyglot WebAssembly

on YouTube ↗34m

" summary

Explains using WebAssembly’s module linking, interface types and the canonical API to run JavaScript and Rust modules together with dynamic linking instead of static bundling. Shows tooling: javy/QuickJS, SpiderMonkey experiments, wit-bindgen, wasm-link modifications and wasmtime host glue. Gives concrete constraints (5 ms execution limit, 256 KB target binary) and measured results: static build ~2.2 MB, 323 µs vs dynamic composition 900 KB, 160 µs — ~50% savings.

AI-written summary · about

" chapters (15)

1. 0:00Introduction
2. 0:24Polyglot WebAssembly defined
3. 1:49Shopify’s WebAssembly work
4. 4:37WebAssembly primer
5. 8:51Constraints for untrusted code
6. 13:03Component model pillars
7. 14:52Static vs dynamic linking
8. 17:42Rust date library
9. 20:07JavaScript consumer module
10. 24:24Adapting module calls
11. 25:47Refactoring wasm-link
12. 27:10Host API setup
13. 28:58Benchmarking results
14. 30:43Polyglot challenges
15. 32:29Summary

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