https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81657
--- Comment #17 from Wilco <wilco at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #16) > (In reply to Wilco from comment #15) > > I don't think it's safe to compare different benchmark results like that. > > But yes the kernel for both should be very similar. The key difference is > > that strchr needs 2x the number of comparisons, which is why an optimized > > strlen will always be faster than strchr. > > That is of course not true, it can do e.g. just the number of comparisons > strlen needs + 1. No, strchr searches for 2 characters, strlen for just 1. Of course if you want to special case strchr (p, 0) to use strlen because that is faster then I guess we agree that is the right transformation.
