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Re: Emacs 29 slow subprocess output when using pipe for connection
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From: |
Eli Zaretskii |
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Subject: |
Re: Emacs 29 slow subprocess output when using pipe for connection |
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Date: |
Sun, 27 Aug 2023 11:35:49 +0300 |
> 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?
Off the top of my head, I don't think we've changed anything
significant in how subprocess output is handled, but maybe I'm
misremembering, or there's a subtle bug.
> Why is the pipe connection so slow? Has no one noticed this because
> the default is to use ptys?
On MS-Windows, only pipes are available, so it's unlikely that any
significant slowdown could go completely unnoticed. Unless the reason
for slow-down doesn't affect the MS-Windows build of Emacs.