The What's, Why's, and How's of Running WebAssembly in Go

on YouTube ↗33m

" summary

Shows a small Go library called reactor Go library that embeds WebAssembly modules (wasm) using selectable runtimes like wasmtime/wasmedge, exposes explicit host capabilities (HTTP, file, sockets) and enforces a deny‑by‑default sandbox. Demonstrates factorial workloads compiled from Rust, TinyGo and AssemblyScript: running factorial(5000) 100,000 times yields roughly 1700 ms vs 4600 ms between Rust/TinyGo and AssemblyScript. Covers hot‑swap of modules, WASI/capability caveats, multi‑tenant limits and the subocli build flow.

AI-written summary · about

" chapters (6)

1. 0:00Start
2. 0:48What is WebAssembly?
3. 2:58Why Wasm makes sense elsewhere
4. 6:16Wasm vs Docker
5. 24:38Use-cases
6. 26:38Caveats

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