Re: Pre-alloc ListCell's optimization

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Pre-alloc ListCell's optimization
Date: 2012-08-30 01:30:26
Message-ID: 20120830013026.GH8753@momjian.us
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On Fri, May 18, 2012 at 06:19:52PM -0400, Stephen Frost wrote:
> * Stephen Frost (sfrost(at)snowman(dot)net) wrote:
> > > llist_opt: 9289 tps
> > > HEAD: 9286 tps
> >
> > llist_opt: 9407 tps
> >
> > Which gives us ~1.3% improvment.
>
> Trying out some different options- going with 32 pre-allocated
> ListCell's actually reduced performance, according to these tests.
>
> Dropping it to 4 improved performance a bit: 9476 tps.
>
> Going to keep playing around and see where this goes.

Any status on this?

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +

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