From: Tom Lane <tgl@sss.pgh.pa.us>
To: Robert Haas <robertmhaas@gmail.com>
cc: Andres Freund <andres@anarazel.de>,
        Claudio Freire <klaussfreire@gmail.com>,
        =?UTF-8?B?0K7RgNC40Lkg0KHQvtC60L7Qu9C+0LI=?= <funny.falcon@gmail.com>,
        Sokolov Yura <funny.falcon@postgrespro.ru>,
        Alvaro Herrera <alvherre@2ndquadrant.com>,
        Heikki Linnakangas <hlinnaka@iki.fi>,
        PostgreSQL-Dev <pgsql-hackers@postgresql.org>
Subject: Re: Small improvement to compactify_tuples
In-reply-to: 
 <CA+TgmobvWtWfdSeHg6Abzxi8ROi3QVWVF_pyeYU+pZ5Km_wOfg@mail.gmail.com>
References: 
 <CAL-rCA10_Tf47iCPMLrR9DVKS0cG-we4eRU-7bxtgCPeAbrqog@mail.gmail.com>
 <CAGTBQpaq4HAtMO-WPaB5dbrLBXcm69+eZC2C51A1oy4rfO+PMg@mail.gmail.com>
 <CAL-rCA1Rk=hU_vEiX5s3_-qCV+mx6JnpsvCr5AeBh57igMvBuw@mail.gmail.com>
 <CAGTBQpa7-t41u_AkfgEWtVFDi2j6qZ2-YbnSHhN8oaGkbOJF4Q@mail.gmail.com>
 <CAL-rCA1_KLQjhyba7ow0VH9Nd6=iO8GzYSrSFVBDvEX8zeCQ_w@mail.gmail.com>
 <CAGTBQpY9RiNGheQcvhTkOqyULvZAjXbjOX1Yj_zmw+zzTg3n6Q@mail.gmail.com>
 <CAL-rCA0fcwsWcUb5H8bM8ZCBFbw4iVo-FfOzfRomS+edHeSb5A@mail.gmail.com>
 <CAGTBQpaZBjJfYGmc=RQ-mG1cWtArvoNV0gMH4qrBNkiaFFUfAQ@mail.gmail.com>
 <CAL-rCA2toMO_NwXb6N85wGJ_KRYSCxwzEEc0-hTV0Oyr86wotw@mail.gmail.com>
 <CAGTBQpbX6Pv1jLc=CjH67qkKGyuL0EwWcoorjg+UfD4LcfiZ_Q@mail.gmail.com>
 <20171107152004.axgznk3n5tkzvnnt@alap3.anarazel.de>
 <29007.1510090796@sss.pgh.pa.us>
 <CA+TgmobyDksaVkoj=VTFovcw02mMBrjsbx7F9Nvm4tXTHU6HfQ@mail.gmail.com>
 <19570.1510155199@sss.pgh.pa.us>
 <CA+TgmobvWtWfdSeHg6Abzxi8ROi3QVWVF_pyeYU+pZ5Km_wOfg@mail.gmail.com>
Comments: In-reply-to Robert Haas <robertmhaas@gmail.com>
	message dated "Wed, 08 Nov 2017 11:19:14 -0500"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <21482.1510158315.1@sss.pgh.pa.us>
Date: Wed, 08 Nov 2017 11:25:15 -0500
Message-ID: <21483.1510158315@sss.pgh.pa.us>
Precedence: bulk
Sender: pgsql-hackers-owner@postgresql.org

Robert Haas <robertmhaas@gmail.com> writes:
> Just to throw a random idea out here, we currently have
> gen_qsort_tuple.pl producing qsort_tuple() and qsort_ssup().  Maybe it
> could be modified to also produce a specialized qsort_itemids().  That
> might be noticeably faster that our general-purpose qsort() for the
> reasons mentioned in the comments in gen_qsort_tuple.pl, viz:

+1 for somebody trying that (I'm not volunteering, though).

			regards, tom lane


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers