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A comment on Mutexes are faster than Spinlocks. Parent comment

Re:Mutexes are faster than Spinlocks by rwem on Saturday January 04, 2020 @01:07PM (#21956330)
That's still unreasonably high, isn't it? Even a Go sync.Mutex, not exactly a hot-rod implementation, can be acquired and released in < 50ns on the garbage hardware I have before me.
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Re:Mutexes are faster than Spinlocks by gpderetta on Saturday January 04, 2020 @03:37PM (#21957309)
On Intel (and probably very similar on AMD) the cost of a completely uncontented, cache hit, simple spin lock acquisition is ~20 clock cycles while the release is almost free.
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