Cloudflare Workers

Build and deploy serverless applications at the edge with Cloudflare Workers — fast, globally distributed, and cost-effective.

Core Concepts

• Workers — serverless functions that run at Cloudflare's edge locations worldwide
• KV Storage — globally distributed key-value store for session data, configuration, and caching
• Durable Objects — strongly consistent, stateful objects for coordination and real-time scenarios
• Environment Bindings — type-safe access to KV namespaces, secrets, and other resources

Best Practices

• Use KV for read-heavy, eventually consistent data (sessions, config, cache)
• Use Durable Objects for write-heavy, strongly consistent data (counters, coordination)
• Keep Workers small and focused — one endpoint per Worker when possible
• Use environment bindings for secrets — never hardcode credentials
• Set appropriate TTL values on KV entries to balance freshness and performance