💡 Even with GOMAXPROCS=1, Go runs ~3 OS threads
🔍 sysmon, main, and spare M keep the runtime alive
⚙️ GC helpers exist but stay parked when GOGC=off
🛠 Tested with GODEBUG=schedtrace and scheddetail flags
👉 Check the full investigation and understand Go’s thread behavior today!
https://levelup.gitconnected.com/how-many-threads-go-creates-in-reality-a-practical-investigation-2025-eff963f3e435
Aleksei Aleinikov
Posted on
🧵 How Many Threads Does Go Really Use? (2025 Test Report)
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