WebAssembly for a Reactive Internet of Things
summary
Argues WebAssembly can move small, signed pieces of logic from cloud to edge to iterate faster: compiles a pricing function as a Rust library compiled to WebAssembly, distributes a ~300‑byte base64 blob via device desired state, and runs it on-device with a wasmer client loading 300-byte base64 module so firmware never changes. Cites cloud hosts using V8, wasm time and V8 runtimes (Cloudflare, Fastly, redpanda), highlights sandboxing, signing, and host-side constraints as the safety model and notes tooling and runtime scrutiny remain open problems.
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chapters (9)
- 0:00Start
- 14:21Extract the price function
- 14:45Load the WebAssembly
- 15:35Call the WebAssembly
- 16:35Update the price function
- 16:48No changes to firmware!
- 17:11Code as Configuration
- 20:51Changing Code at Run-Time
- 23:26Picking a Client Run-Time
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