Re: Draft release notes for next week's releases
От | Oleg Bartunov |
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Тема | Re: Draft release notes for next week's releases |
Дата | |
Msg-id | CAF4Au4xpQxeiNVq4_vB3RutnN=NvFDUYkJ3pM6FJOJREi2zqOA@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Draft release notes for next week's releases (Peter Geoghegan <pg@heroku.com>) |
Ответы |
Re: Draft release notes for next week's releases
|
Список | pgsql-hackers |
On Mon, Mar 28, 2016 at 2:06 PM, Peter Geoghegan <pg@heroku.com> wrote:
On Mon, Mar 28, 2016 at 12:55 AM, Oleg Bartunov <obartunov@gmail.com> wrote:
> We'll post the patch.
Cool.
> Teodor made something to get abbreviated keys work as
> I remember. I should say, that 27x improvement I got on my macbook. I will
> check on linux.
I think that Linux will be much faster. The stxfrm() blob produced by
Mac OSX will have a horribly low concentration of entropy. For an 8
byte Datum, you get only 2 distinguishing bytes. It's really, really
bad. Mac OSX probably makes very little use of strxfrm() in practice;
there are proprietary APIs that do something similar, but all using
UTF-16 only.
Yes, Linux is much-much faster, I see no difference in performance using latest icu 57_1.
I tested on Ubuntu 14.4.04. But still, icu provides us abbreviated keys and collation stability,
so let's add --with-icu.
--
Peter Geoghegan
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