| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, John Naylor <johncnaylorls(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Amit Langote <amitlangote09(at)gmail(dot)com>, jian he <jian(dot)universality(at)gmail(dot)com>, Erik Rijkers <er(at)xs4all(dot)nl>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: remaining sql/json patches |
| Date: | 2023-11-29 19:41:42 |
| Message-ID: | 20231129194142.4rkv7gaoumxfhgt7@awork3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2023-11-29 14:21:59 -0500, Andrew Dunstan wrote:
> On 2023-11-29 We 12:42, Andres Freund wrote:
> > > I do have a CFLAGS setting, but for meson I used '-Ddebug=true' and no
> > > buildtype or optimization setting. However, I see that in meson.build we're
> > > defaulting to "buildtype=debugoptimized" as opposed to the standard meson
> > > "buildtype=debug", so I guess that accounts for it.
> > >
> > > Still getting used to this stuff.
> > What I meant was whether you set CFLAGS for the *autoconf* build,
>
> That's what I meant too.
>
> > because that
> > will result in an unoptimized build unless you explicitly add -O2 (or whatnot)
> > to the flags. Doing benchmarking without compiler optimizations is pretty
> > pointless.
> >
>
> Right. My latest reported results should all be at -O2.
Why are the results suddenly so much slower?
Greetings,
Andres Freund
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