| From: | Peter Geoghegan <pg(at)heroku(dot)com> |
|---|---|
| To: | Oleg Bartunov <obartunov(at)gmail(dot)com> |
| Cc: | Teodor Sigaev <teodor(at)postgrespro(dot)ru>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>, tgl Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Subject: | Re: Draft release notes for next week's releases |
| Date: | 2016-03-28 08:06:25 |
| Message-ID: | CAM3SWZTxe7fviX8Nz+a_dY0XuzM_4Nqh-13k1VzYAxSSV7iWqg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Mar 28, 2016 at 12:55 AM, Oleg Bartunov <obartunov(at)gmail(dot)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.
--
Peter Geoghegan
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