3 ms·
Relatively expensive was probably not phrased well, but a goroutine context switch is ~200 nanoseconds and instantiating a new one takes ~1 microsecond, from me
by strken 6y ago
Relatively expensive was probably not phrased well, but a goroutine context switch is ~200 nanoseconds and instantiating a new one takes ~1 microsecond, from memory and a quick google.
- jashmatthews 6y agoDoing nothing 10x as fast is not all that useful. In a real app it's unlikely the difference in context switching being 0.2% of your CPU time or 0.02% of your CPU time matters. It's also not a fundamental restriction on threads vs Goroutines either. switchto is very nearly as fast a Goroutine context switching https://www.phoronix.com/scan.php?page=news_item&px=Google-User-Thread-Futex-Swap https://www.phoronix.com/scan.php?page=news_item&px=Google-U...