Re: Emitting JSON to file using COPY TO

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