When a user in Tokyo hits an endpoint deployed in us-east-1, they are paying a ~150ms round-trip tax before your application code even runs. Edge deployments eliminate this tax by running your code in a datacenter geographically close to each request.
The shift is not just topological. Edge runtimes are typically V8-isolate-based (Cloudflare Workers, Deno Deploy) rather than Node.js processes, which means cold-start overhead drops from seconds to under a millisecond. You get a fundamentally different latency profile.
The trade-off is runtime constraints: no filesystem access, limited CPU time per request, and a smaller subset of Node.js APIs. For most HTTP handlers — routing, authentication, SSR, API proxying — these constraints are invisible. For heavy CPU work or legacy Node.js dependencies, you will need a hybrid strategy.
At Barefoot we run every deploy preview on the edge by default. Production traffic is automatically routed to the nearest region. The result: median TTFB under 40ms globally, without any application-level changes from our customers.
Getting started is straightforward. Annotate your handlers with `@edge` or set `runtime: "edge"` in your config. Barefoot handles region rollout, health checks, and failover automatically. If an edge region degrades, traffic silently reroutes to the next nearest healthy node.