Fastly Compute

What Is Fastly Compute?

Edge compute platform running WebAssembly at the network edge with sub-millisecond startup It has growing ecosystem with rust and go sdks; fastly fiddle for testing; integrates with fastly's cdn and security services ecosystem maturity and a moderate to high — wasm compilation workflow and edge-specific patterns require adjustment from traditional serverless learning curve.

How Fastly Compute Works

Wasm-based execution on Fastly's edge network; compiles Rust, Go, and JavaScript to WebAssembly for isolated, sandboxed execution at CDN PoPs

Key Use Cases

• Edge API processing and routing
• Request/response transformation at the edge
• A/B testing and personalization at CDN level
• Authentication and authorization at the edge

When to Use Fastly Compute

Fastly Compute is a strong choice when your project requires edge api processing and routing, request/response transformation at the edge, a/b testing and personalization at cdn level. Its performance profile is characterized by sub-millisecond cold starts with wasm; low memory footprint; executes at cdn edge locations for minimal latency.

Strengths and Advantages

• Performance: Sub-millisecond cold starts with Wasm; low memory footprint; executes at CDN edge locations for minimal latency
• Ecosystem: Growing ecosystem with Rust and Go SDKs; Fastly Fiddle for testing; integrates with Fastly's CDN and security services maturity
• Learning Curve: Moderate to high — Wasm compilation workflow and edge-specific patterns require adjustment from traditional serverless

Limitations and Considerations

Requires WebAssembly compilation step; JavaScript support via JS SDK is less mature than native Wasm languages; smaller developer community than Cloudflare Workers

Compared to Alternatives

Fastly Compute is often compared with other tools in the serverless space. Explore detailed side-by-side comparisons: