| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andres Freund <andres(at)anarazel(dot)de>, Claudio Freire <klaussfreire(at)gmail(dot)com>, Юрий Соколов <funny(dot)falcon(at)gmail(dot)com>, Sokolov Yura <funny(dot)falcon(at)postgrespro(dot)ru>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, PostgreSQL-Dev <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Small improvement to compactify_tuples |
| Date: | 2017-11-08 16:26:40 |
| Message-ID: | CAH2-WzkcVzWnDMuZrgcZv9SZcfNSF=t5KiLTBWjmzO51yvYAaA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Nov 8, 2017 at 8:19 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> I don't remember any more just how much faster qsort_tuple() and
> qsort_ssup() are than plain qsort(), but it was significant enough to
> convince me to commit 337b6f5ecf05b21b5e997986884d097d60e4e3d0...
IIRC, qsort_ssup() was about 20% faster at the time, while
qsort_tuple() was 5% - 10% faster.
--
Peter Geoghegan
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