alt Hacker NewsIt absolutely can make a difference because if you have locks that are supposed to sync or wake up other processes you care about latency not cpu usage.
It absolutely can make a difference because if you have locks that are supposed to sync or wake up other processes you care about latency not cpu usage.
What specifically are you saying can make a difference?
I'm saying that extra overhead from making your lock work across processes should be very tiny. That overhead shouldn't add much more than a microsecond in either latency or CPU usage, compared to an in-process lock.