What is Edge Computing?
Edge computing is a distributed computing paradigm that processes data and runs application logic at network edge locations close to end users, rather than in a centralized data center. This reduces latency and improves performance by minimizing the physical distance data must travel.
How Does Edge Computing Work?
Edge computing brings computation and data storage closer to the devices and users that need it. Instead of sending every request to a distant origin server, edge servers in locations around the world can handle processing locally. In web hosting, this manifests as edge functions (like Cloudflare Workers, Vercel Edge Functions, and Deno Deploy) that execute server-side logic at CDN edge locations, providing response times measured in single-digit milliseconds.
Edge computing is transforming web hosting by enabling personalized content delivery, real-time data processing, A/B testing, authentication, and API routing at the edge without round trips to a central server. Edge functions are typically lightweight, running in V8 isolates or WebAssembly environments with fast cold starts. The trade-off is limited execution time and memory compared to traditional servers, and the challenge of managing distributed state. Edge computing is particularly valuable for global applications where users are spread across different continents and latency-sensitive operations like real-time bidding, geolocation-based content, and authentication checks.