| From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
|---|---|
| To: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Ron Peacetree <rjpeace(at)earthlink(dot)net>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [PERFORM] A Better External Sort? |
| Date: | 2005-10-04 10:04:56 |
| Message-ID: | 20051004100441.GC17589@svana.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers pgsql-performance |
On Mon, Oct 03, 2005 at 10:51:32PM +0100, Simon Riggs wrote:
> > Basically, I recommend adding "-Winline -finline-limit-1500" to the
> > default build while we discuss other options.
>
> I add -Winline but get no warnings. Why would I use -finline-limit-1500?
>
> I'm interested, but uncertain as to what difference this makes. Surely
> using -O3 works fine?
Different versions of gcc have different ideas of when a function can
be inlined. From my reading of the documentation, this decision is
independant of optimisation level. Maybe your gcc version has a limit
higher than 1500 by default.
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.
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