Go’s net/http package is deceptively simple on the surface—just call http.ListenAndServe() and pass a handler. But beneath its minimal API lies a highly optimized, battle-tested, and beautifully engineered HTTP runtime.

This article explores the internal architecture, concurrency model, lifecycle, request handling flow, connection reuse, transport behaviors, and performance strategies that make net/http one of Go’s most iconic packages.

This is a true deep dive—use it to understand how Go’s HTTP stack really works under the hood.