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From: Nathan Bossart <nathandbossart@gmail.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Joe Conway <mail@joeconway.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Davin Shearer <davin@apache.org>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: Emitting JSON to file using COPY TO
Date: Wed, 6 Dec 2023 15:41:11 -0600
Message-ID: <20231206214111.GA2878164@nathanxps13> (raw)
In-Reply-To: <1136975.1701894046@sss.pgh.pa.us>
References: <7a60faf6-e7f1-419d-aee6-10a78ea2fe81@joeconway.com>
	<2e7ff718-895d-83fc-46f7-be25e23b23b4@dunslane.net>
	<!bbf922c5-f571-483e-a2c6-2730b02183fe@joeconway.com>
	<1104915.1701877459@sss.pgh.pa.us>
	<19a5f9d8-bd1f-9!e51-0f5b-510c1189a8a7@dunslane.net>
	<1110690.1701880139@sss.pgh.pa.us>
	<20231206163349.GA2873889@nathanxps13>
	<20231206164439.GC2873889@nathanxps13>
	<77312d02-9325-4f14-9fe0-2746c2ee12bc@joeconway.com>
	<1136975.1701894046@sss.pgh.pa.us>

On Wed, Dec 06, 2023 at 03:20:46PM -0500, Tom Lane wrote:
> If Nathan's perf results hold up elsewhere, it seems like some
> micro-optimization around the text-pushing (appendStringInfoString)
> might be more useful than caching.  The 7% spent in cache lookups
> could be worth going after later, but it's not the top of the list.

Agreed.

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com

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