Messages in this thread | | | Subject | Re: gettimeofday() a special case : why? | Date | Mon, 13 Dec 1999 11:30:00 +0100 | From | Olaf Titz <> |
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> I don't want to be too OT or bothersome, but can someone explain why > gettimeofday() is the one syscall that optimization at the ~100 cycle level > makes sense for? If it's a long explanation, a link or pointer to a book is
Because it's used _very_ often. (Do strace on any X client to verify.) Because speeding it up improves accuracy (for applications that care). Because it's rather simple, so a speed up in the syscall interface has more effect on this syscall than on a complex one like read().
Olaf
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