Geo Pulse #48 — Geo-routing at the edge: three approaches, three tradeoffs

Geo Pulse #48 — Geo-routing at the edge: three approaches, three tradeoffs
Theme: where you make the country decision changes speed, accuracy, and SEO.

— DNS-based geo-routing (Route 53 geolocation, Cloudflare load balancing) → fast and cache-friendly, but routes by resolver location, which for users on Google DNS (8.8.8.8) can be a whole continent off.
— Edge worker geo (Cloudflare Workers, Lambda@Edge) → reads the real client IP, so accuracy jumps; costs a little latency and engineering. Best for content variation by country.
— Client-side JS geolocation → most accurate (asks the device) but invisible to crawlers and slow — bad for any indexable content decision.

The SEO trap: any geo-redirect Googlebot can't follow consistently risks the wrong-country version getting indexed. Serve, don't redirect, when SEO matters.

Credit: Cloudflare's own geo-routing docs and Google's longstanding 'locale-adaptive crawling' guidance.