alt Hacker NewsIsn't the point of using atomics that there is virtually no performance penalty in single threaded contexts?
IMO "zero cost abstraction" just means "I have a slightly less vague idea of what this will compile to."
Isn't the point of using atomics that there is virtually no performance penalty in single threaded contexts?
IMO "zero cost abstraction" just means "I have a slightly less vague idea of what this will compile to."
No, atomics do have a performance penality compared to the equivalent single threaded code due to having to fetch/flush the impacted cache lines in the eventuality that another thread is trying to atomically read/write the same memory location at the same time.