infrastructure//edge computing//PoP

A Point of Presence is a physical location (usually a small datacenter or server cluster in a city) where a network provider keeps equipment to serve users nearby.

A Point of Presence is a physical location (usually a small datacenter or server cluster in a city) where a network provider keeps equipment to serve users nearby.

A PoP is the building, and the edge servers (nodes) inside it are the machines. Cloudflare has more than 300 PoPs worldwide, so a request from Madrid hits the Madrid PoP rather than a server in Virginia. More PoPs mean lower latency for more users, because the code runs physically closer to them.

When Workers code deploys, it replicates to every PoP. The first request at a given PoP initializes the V8 isolate, and after that it is warm. A PoP has many V8 isolates running in parallel. V8 is single-threaded, but the PoP runs many independent isolates to handle concurrency: the CPU time limit is per isolate, not per PoP.