A useful complement to JavaScript
JavaScript is a strong default for request handling, but image transforms, parsers, compression, and domain-specific logic sometimes benefit from a compiled execution target. WebAssembly makes it possible to move those workloads closer to users without adding a second hosting platform.
The runtime contract
- Explicit memory and execution limits prevent one workload from starving another.
- Deterministic builds make promotion between environments repeatable.
- The same observability model captures WebAssembly errors alongside application logs.
Where it fits
Use WebAssembly for bounded, CPU-oriented units of work. Keep connection-heavy or stateful services behind a dedicated API when they need long-lived processes, specialized networking, or direct database sessions.
Operational guidance
Treat the WebAssembly module as part of your deployment artifact. Version it, test it with production-shaped inputs, and expose a clear fallback path when a module cannot safely process a request.
Use the runtime deliberately
The runtime documentation covers module boundaries, limits, deployment packaging, and observability considerations.