public inbox for [email protected]  

help / color / mirror / Atom feed

From: Joe Conway <[email protected]>
To: Nathan Bossart <[email protected]>
To: Tom Lane <[email protected]>
Cc: Andrew Dunstan <[email protected]>
Cc: Davin Shearer <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Emitting JSON to file using COPY TO
Date: Wed, 6 Dec 2023 14:48:52 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <20231206164439.GC2873889@nathanxps13>
References: <[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<20231206163349.GA2873889@nathanxps13>
	<20231206164439.GC2873889@nathanxps13>

On 12/6/23 11:44, Nathan Bossart wrote:
> On Wed, Dec 06, 2023 at 10:33:49AM -0600, Nathan Bossart wrote:
>> 	(format csv)
>> 	Time: 12295.480 ms (00:12.295)
>> 	Time: 12311.059 ms (00:12.311)
>> 	Time: 12305.469 ms (00:12.305)
>> 
>> 	(format json)
>> 	Time: 24568.621 ms (00:24.569)
>> 	Time: 23756.234 ms (00:23.756)
>> 	Time: 24265.730 ms (00:24.266)
> 
> I should also note that the json output is 85% larger than the csv output.

I'll see if I can add some caching to composite_to_json(), but based on 
the relative data size it does not sound like there is much performance 
left on the table to go after, no?

-- 
Joe Conway
PostgreSQL Contributors Team
RDS Open Source Databases
Amazon Web Services: https://aws.amazon.com

view thread (37+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: Emitting JSON to file using COPY TO
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox