GNU bug report logs - #66288
29.1; Performance regression using pipe for subprocess

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From: Gregory Heytings <gregory <at> heytings.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: gerd.moellmann <at> gmail.com, dmitry <at> gutov.dev, Paul Eggert <eggert <at> cs.ucla.edu>, Chris Hanson <cph <at> chris-hanson.org>, 66288 <at> debbugs.gnu.org
Subject: bug#66288: 29.1; Performance regression using pipe for subprocess
Date: Wed, 04 Oct 2023 09:10:46 +0000

>
> Therefore, one simple change is for xscheme.el to make the value of 
> read-process-output-max to 64KB.  Chris, can you test that, using the 
> unmodified 29.1 sources?
>

I'm not Chris, but that works indeed.

>
> A perhaps better change is the one below, which realizes that the fcntl 
> call was added to create_process for fixing bug#55737 so as to allow 
> _enlarging_ the pipe size when very large reads are required; it was 
> never meant to _reduce_ the default size of the pipe:
>

Indeed.

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