GNU bug report logs - #39598
26.3; Emacs is extremely unresponsive on a trivial python file

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Message #26 received at 39598 <at> debbugs.gnu.org (full text, mbox):

From: Ivan Oreshnikov <oreshnikov.ivan <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 39598 <at> debbugs.gnu.org
Subject: Re: bug#39598: 26.3; Emacs is extremely unresponsive on a trivial
 python file
Date: Sat, 15 Feb 2020 19:49:37 +0100

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> What is/are the real-life use case(s) where such long series of strings
causes slowdown?

This is an intermediate state of python buffer when I am trying to build a
large-ish dictionary with lists of strings as a value. The most recent time
this happened to me is when I was writing a django migration that would
organize a list of entities into groups. I did a query to the database,
copied the column of string ids, added a double quote to the beginning and
to the end and when I tried to group and rearrange the lines together
before I wrap them into lists, but emacs became unresponsive.

What I find a bit weird is that it only happens to a long series of bare
strings. If I construct an equally long proper python list of strings I
don't see this behavior.

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