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".
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