Adopting JavaScript on WebAssembly at Shopify
Talkat Cloud Native Wasm Day North America 2021 · on Tuesday, 2021-10-12· at 13:45· Room 501 ABC + Online·
summary
Shopify ported JavaScript to server-side WebAssembly by bundling TypeScript with webpack and javi into index.wasm, pre-initializing the QuickJS runtime with Wizer to snapshot engine and app state, then running modules under Wasmtime. Startup time improves roughly 50%; complex scripts meet a 5 ms SLO, though JavaScript runs ~400–600 μs slower than AssemblyScript in some numeric/string benchmarks and regex runs about twice as fast. The pipeline produces reproducible wasm artifacts and works in production.
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chapters (6)
- 0:00Start
- 3:16Exclusively for WebAssembly
- 3:44Runtime dependency
- 4:21The Road to JavaScript
- 10:53How does this apply to JavaScript
- 16:43Trade-offs (performance)
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