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From: Justin Pryzby <pryzby@telsasoft.com>
To: Ranier Vilela <ranier.vf@gmail.com>
Cc: ldh@laurent-hasson.com, Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: Big Performance drop of Exceptions in UDFs between V11.2 and 13.4
Date: Sun, 22 Aug 2021 19:42:48 -0500
Message-ID: <20210823004248.GA10479@telsasoft.com> (raw)
In-Reply-To: <CAEudQAq8B+OfdKPGm5Wj-6kaWumTfffKD9y8Q_e3KKtnSidwog@mail.gmail.com>
References: <CAEudQAocYZieAMgCtXa8Oau8=dVJ1_R1r0coLeF1LfiYkBCTNA@mail.gmail.com>
	<20210822154758.GZ10479@telsasoft.com>
	<30496.1629654632@sss.pgh.pa.us>
	<MN2PR15MB2560C3FF951319B18A3CA83585C39@MN2PR15MB2560.namprd15.prod.outlook.com>
	<MN2PR15MB25601CCA9E337403E1754BDE85C39@MN2PR15MB2560.namprd15.prod.outlook.com>
	<35729.1629660223@sss.pgh.pa.us>
	<MN2PR15MB2560634E97465D56FFB4601D85C39@MN2PR15MB2560.namprd15.prod.outlook.com>
	<38107.1629663085@sss.pgh.pa.us>
	<MN2PR15MB2560F5ABDE7BE85C11625AFD85C39@MN2PR15MB2560.namprd15.prod.outlook.com>
	<CAEudQAq8B+OfdKPGm5Wj-6kaWumTfffKD9y8Q_e3KKtnSidwog@mail.gmail.com>

On Sun, Aug 22, 2021 at 08:44:34PM -0300, Ranier Vilela wrote:
> > If there is any way I can help further... I am definitely not able to do a
> > dev environment and local build, but if we have a windows developer
> > reproducing the issue between 11 and 12, then that should help. If someone
> > makes a debug build available to me, I can provide additional help based on
> > that.
>
> Please, download from this link (Google Drive):
> 
> https://drive.google.com/file/d/13kPbNmk54lR6t-lwcwi-63UdM55sA27t/view?usp=sharing

Laurent gave a recipe to reproduce the problem, and you seemed to be able to
reproduce it, so I think Laurent's part is done.  The burden now lies with
postgres developers to isolate the issue, and Andrew said he would bisect to
look for the culprit commit.

-- 
Justin





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