On Sun, Mar 10, 2013 at 12:43 PM, Antoine Pelisse <apeli...@gmail.com> wrote: > On Sun, Mar 10, 2013 at 11:38 AM, Duy Nguyen <pclo...@gmail.com> wrote: >> glibc's C strncmp version does 4-byte comparison at a time when n >=4, >> then fall back to 1-byte for the rest. > > Looking at this > (http://fossies.org/dox/glibc-2.17/strncmp_8c_source.html), it's not > exactly true. > > It would rather be while (n >= 4), manually unroll the loop.
By the way, if we know the length of the string, we could use memcmp. This one is allowed to compare 4-bytes at a time (he doesn't care about end of string). This is true because the value of the length parameter is no longer "at most". -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
