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Glossary · Hosting & infrastructure

Edge compute

Running application code at CDN edge locations close to users, instead of from a single origin region.

Definition

In long form.

Edge compute platforms (Cloudflare Workers, Vercel Edge Functions, AWS Lambda@Edge, Deno Deploy) run JavaScript, TypeScript, or WebAssembly at hundreds of POPs worldwide. Common use cases: A/B testing, geolocation routing, request rewriting, authentication, simple personalization, JSON API responses. Limitations: smaller compute envelope than a regional server (cold starts, memory limits, no long-lived connections), and stateful operations require coordination with a database that's also globally distributed.

In context

We use edge compute for things like locale routing (detect Accept-Language at the edge, rewrite the URL) and lightweight authentication (validate a JWT before letting a request reach the origin). Heavy work — image processing, ML inference — still goes to a regional server.

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Edge compute — Glossary | Nessim Works