🧵 Why does your “tiny” Go app start 5 threads?

Even a single goroutine quietly wakes a whole runtime crew.

👀 Learn what really happens behind the scenes:
✅ Why GOMAXPROCS ≠ thread count
✅ What sysmon does (and why it matters)
✅ How LockOSThread, blocking syscalls, and cgo spawn extras
✅ When threads sleep, freeze, or stick around forever
✅ Why “orphaned” threads still eat stack memory

💡 Includes mini examples with ps, runtime, and raw syscalls.

📖 Full deep-dive here:
https://levelup.gitconnected.com/understanding-os-threads-in-go-applications-insights-for-2025-326012bdc67a