From: Tom Lane <tgl@sss.pgh.pa.us>
To: Ranier Vilela <ranier.vf@gmail.com>
cc: "ldh@laurent-hasson.com" <ldh@laurent-hasson.com>,
        Andrew Dunstan <andrew@dunslane.net>,
        Justin Pryzby <pryzby@telsasoft.com>,
        "pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: Big Performance drop of Exceptions in UDFs between V11.2 and 13.4
In-reply-to: 
 <CAEudQApD2F17Fz7cQNUZbrx7K3P1Y=KFCc4V3UZthPFgp+radQ@mail.gmail.com>
References: 
 <MN2PR15MB2560AE2A878FBBE88DCFF33385C29@MN2PR15MB2560.namprd15.prod.outlook.com>
 <2092859.1629558281@sss.pgh.pa.us>
 <MN2PR15MB25607BDC72A325CA9B9D3E3385C29@MN2PR15MB2560.namprd15.prod.outlook.com>
 <2136207.1629569846@sss.pgh.pa.us> <20210821191950.GW10479@telsasoft.com>
 <MN2PR15MB2560ED2A8F967B14E7D7881E85C29@MN2PR15MB2560.namprd15.prod.outlook.com>
 <20210821221729.GY10479@telsasoft.com>
 <MN2PR15MB2560FB03666CEABB651FB32185C29@MN2PR15MB2560.namprd15.prod.outlook.com>
 <MN2PR15MB256034533A31A7C11E3C347985C39@MN2PR15MB2560.namprd15.prod.outlook.com>
 <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>
 <846170.1630086205@sss.pgh.pa.us>
 <DM6PR15MB2554454557C7612A93F76A9D85C99@DM6PR15MB2554.namprd15.prod.outlook.com>
 <1050917.1630180243@sss.pgh.pa.us>
 <MN2PR15MB2560A083DA8CD3418BEA1DA085CA9@MN2PR15MB2560.namprd15.prod.outlook.com>
 <CAEudQApD2F17Fz7cQNUZbrx7K3P1Y=KFCc4V3UZthPFgp+radQ@mail.gmail.com>
Comments: In-reply-to Ranier Vilela <ranier.vf@gmail.com>
	message dated "Sun, 29 Aug 2021 09:53:57 -0300"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <1124169.1630244105.1@sss.pgh.pa.us>
Date: Sun, 29 Aug 2021 09:35:05 -0400
Message-ID: <1124170.1630244105@sss.pgh.pa.us>
Archived-At: 
 <https://www.postgresql.org/message-id/1124170.1630244105%40sss.pgh.pa.us>
Precedence: bulk

Ranier Vilela <ranier.vf@gmail.com> writes:
> I retested this case with HEAD, and it seems to me that NLS does affect it.

Sure, there's no question that message translation will have *some* cost.
But on my machine it is an incremental tens-of-percent kind of cost,
and that is the result you're getting as well.  So it's not very clear
where these factor-of-several-hundred differences are coming from.

			regards, tom lane