Code Wrench

Feb 7, 2026 · Backend Development

How Go’s Netpoller Powers Millions of Connections – 5 Real‑World Cases

This article explains why Go programs often fail to reach C10M concurrency, analyzes five real‑world incidents, reveals the inner workings of Go's netpoller, and provides concrete code‑level optimizations, configuration tweaks, and load‑testing practices to achieve stable million‑connection services.