Thread

Re: libpq: PQgetCopyData() and allocation overhead

Jeroen Vermeulen <jtvjtv@gmail.com> — 2023-03-02T19:44:48Z

My apologies.  The wiki said to discuss early, even before writing the code
if possible, but I added a link to the PR for those who really wanted to
see the details.

I'm attaching a diff now.  This is not a patch, it's just a discussion
piece.

The problem was that PQgetCopyData loops use a lot of CPU time, and this
alternative reduces that by a lot.


Jeroen

On Thu, 2 Mar 2023 at 13:38, Daniel Gustafsson <daniel@yesql.se> wrote:

> > On 1 Mar 2023, at 15:23, Jeroen Vermeulen <jtvjtv@gmail.com> wrote:
>
> > PR for easy discussion: https://github.com/jtv/postgres/pull/1
>
> The process for discussing work on pgsql-hackers is to attach the patch to
> the
> email and discuss it inline in the thread.  That way all versions of the
> patch
> as well as the discussion is archived and searchable.
>
> --
> Daniel Gustafsson
>
>