Handling 9B Daily Requests: Cloudflare Migrates cdnjs to Its Developer Platform

JeremyCMorgan · x · 2026-08-07

Cloudflare has completely migrated cdnjs, one of the internet's busiest open-source CDNs, to its own Developer Platform. Serving around 12% of all websites, cdnjs processes a staggering 9 billion requests per day.

This massive dogfooding exercise not only proved the readiness of Cloudflare’s platform but also surfaced critical limits when dealing with extreme real-world traffic. Consequently, Cloudflare raised the limits for Workers and Workflows. The engineering post details what breaks first when serverless architecture meets massive scale and the corresponding optimizations applied.

Original post →

More from Infra

Infra channel →