Cloud//edge computing//PoP

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

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

Cloudflare has 300+ PoPs worldwide. Each PoP contains multiple edge servers (nodes).

A PoP is the building. The edge servers inside it are the machines. A request from Madrid hits the Madrid PoP, not a server in Virginia.

More PoPs = 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 — after that, it's 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.