Question 1

How to deploy a Spin application to production?

Accepted Answer

Spin apps can be deployed to Fermyon Cloud or self-hosted using the Spin runtime; check the distribution guide in the documentation, but integration with major clouds like AWS or Azure often requires custom setup or third-party tools.

Question 2

Spin vs AWS Lambda: which is better for serverless?

Accepted Answer

Spin offers faster cold starts and better security via WebAssembly sandboxing, but AWS Lambda has a more mature ecosystem and broader service integrations. Choose Spin for portable, multi-language microservices with lower overhead, and Lambda for extensive AWS-native features.

Question 3

How to add a database like PostgreSQL to a Spin app?

Accepted Answer

Use the built-in PostgreSQL API from the Spin SDK; for example, in Rust, import `spin_sdk::pg` and configure the database URL via environment variables, as detailed in the RDBMS storage guide.

Question 4

Can Spin handle WebSocket connections?

Accepted Answer

Spin primarily supports HTTP and Redis triggers; WebSockets aren't natively included, so you'd need to implement them using HTTP with upgrades or rely on external services, which may require custom workarounds.

Question 5

What are the performance benchmarks for Spin compared to containers?

Accepted Answer

Spin typically has lower memory footprint and faster startup times due to WebAssembly, but for CPU-intensive tasks, traditional containers might outperform; specific benchmarks vary by workload and should be tested with your application.

Question 6

How to debug a Spin application locally?

Accepted Answer

Use the `spin up` command with logging enabled, and integrate with IDE debuggers for supported languages like Rust or JavaScript; however, tooling is less mature than for Docker or Node.js, so expect some limitations.

Spin

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