# Sub-18ms Edge Middleware Routing
Traditional server rendering requires routing requests back to a single origin server, causing high latency for international users.
## Edge Middleware Benefits:
- **Global Distribution**: Code runs in 200+ Vercel/Cloudflare edge locations.
- **Sub-18ms Execution**: Intercept and rewrite request headers before HTML compilation.
- **Dynamic Geo-Targeting**: Serve region-specific content (US, UK, UAE, India) instantly.
Engineering
Sub-18ms Edge Middleware Routing in Next.js
How Vercel and Cloudflare Edge Middleware execute geolocation routing, authentication, and A/B tests at the network edge.
Lalit Kumar
Author
Jul 10, 2026
5 min read
#Edge Computing#Next.js Middleware#Vercel#DevOps
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