Re: Emacs 29 slow subprocess output when using pipe for connection

[Eli Zaretskii]

> Date: Sun, 27 Aug 2023 11:35:49 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > Date: Fri, 25 Aug 2023 23:39:23 -0400
> > From: Chris Hanson <cph@chris-hanson.org>
> > 
> > On Emacs 29, I've noticed when using the MIT/GNU Scheme interaction mode 
> > (xscheme.el) the output is extremely slow; it was fine in Emacs 28.
> 
> Please define "extremely slow" in more quantitative terms.  E.g., can
> you show a comparative benchmark between these two versions of Emacs,
> so that the relative times could be assessed?

And please also show the details of the Emacs configuration and build
in both versions, so that their comparative performances could be
assessed.  The relevant variables are:

  . system-configuration
  . system-configuration-options
  . system-configuration-features

I assume that you run both versions on the same system, or on systems
with very similar hardware and software configurations.  If not,
please describe that as well.