What’s Next for WebAssembly on the Server—and How to See It in Action
summary
Server WebAssembly runs in real runtimes not just theory: demos use Docker with Wasm runtime, Spin + SpinKube for Kubernetes, WasmCloud and Wasmtime and Golem for deployment. Measured claims include near‑native throughput about 14% slower, runtime cold starts ~160% faster than containers, worse‑case latency tradeoffs (15s vs 0.8s) and dramatic image shrinkage from 423 MB → 2.4 MB. Observability integrates via OpenTelemetry OTLP exporters and local Aspire/OpenTelemetry Collector tooling so traces metrics and logs are exportable and inspectable.
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chapters (18)
- 0:00Introduction
- 0:44WebAssembly server potential
- 3:11WebAssembly history and goals
- 5:40WebAssembly System Interface for the server
- 6:22Wasm runtimes for servers
- 8:53Spin runtime tooling
- 10:19WasmCloud cloud-native
- 11:44WasmTime performance
- 14:10Why Wasm on server
- 14:31Wasm performance benefits
- 15:57Cold start vs Docker
- 19:26Resource efficiency
- 21:13Observability with OpenTelemetry
- 25:26WasmCloud + OpenTelemetry
- 28:15Spin automated observability
- 33:31Wasm runtimes summary
- 34:12Choosing Wasm for workloads
- 34:53OpenTelemetry future
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