Re:Why Wasn't Ruby 3 Faster?
by strken on Wednesday February 10, 2021 @11:07PM
(#26098155)
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.
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Re:Why Wasn't Ruby 3 Faster?
by jashmatthews on Thursday February 11, 2021 @01:51AM
(#26098946)
Doing 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-U...