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Re: B-Tree support function number 3 (strxfrm() optimization) - Mailing list pgsql-hackers

From Noah Misch
Subject Re: B-Tree support function number 3 (strxfrm() optimization)
Date
Msg-id 20140806050156.GA91445@tornado.leadboat.com
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In response to Re: B-Tree support function number 3 (strxfrm() optimization)  (Peter Geoghegan <pg@heroku.com>)
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On Tue, Aug 05, 2014 at 09:32:59PM -0700, Peter Geoghegan wrote:
> On Tue, Aug 5, 2014 at 8:55 PM, Noah Misch <noah@leadboat.com> wrote:
> > Comparator cost affects external sorts more than it affects internal sorts.
> > When I profiled internal and external int4 sorting, btint4cmp() was 0.37% of
> > the internal sort profile and 10.26% of the external sort profile.
> 
> Did you attempt to characterize where wall time was being spent?

No.  I have the perf data files, if you'd like to see any particular report.

-- 
Noah Misch
EnterpriseDB                                 http://www.enterprisedb.com

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