Re: Make COPY format extendable: Extract COPY TO format implementations - Mailing list pgsql-hackers

On Fri, Feb 02, 2024 at 12:19:51AM +0900, Sutou Kouhei wrote:
> Here are some numbers on my local machine (Note that my
> local machine isn't suitable for benchmark as I said
> before. Each number is median of "\watch 15" results):
>>
> I'll measure again on my local machine later. I'll stop
> other processes such as Web browser, editor and so on as
> much as possible when I do.

Thanks for compiling some numbers.  This is showing a lot of variance.
Expecially, these two lines in table 2 are showing surprising results
for v7:
  direction     format  n_columns     master         v7        v10
       from        csv          1    917.973   1695.401    871.991
       from     binary          1    841.104   1422.012    820.786

I am going to try to plug in some rusage() calls in the backend for
the COPY paths.  I hope that gives more precision about the backend
activity.  I'll post that with more numbers.
--
Michael