On Mon, Sep 15, 2014 at 7:21 PM, Peter Geoghegan <pg@heroku.com> wrote:
> On Mon, Sep 15, 2014 at 11:25 AM, Peter Geoghegan <pg@heroku.com> wrote:
>> OK, I'll draft a patch for that today, including similar alterations
>> to varstr_cmp() for the benefit of Windows and so on.
>
> I attach a much simpler patch, that only adds an opportunistic
> "memcmp() == 0" before a possible strcoll(). Both
> bttextfastcmp_locale() and varstr_cmp() have the optimization added,
> since there is no point in leaving anyone out for this part.
Even though our testing seems to indicate that the memcmp() is
basically free, I think it would be good to make the effort to avoid
doing memcmp() and then strcoll() and then strncmp(). Seems like it
shouldn't be too hard.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
