[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#44464: 28.0.50; slow shell output
From: |
Phil Sainty |
Subject: |
bug#44464: 28.0.50; slow shell output |
Date: |
Fri, 6 Nov 2020 02:54:17 +1300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 5/11/20 11:55 pm, Basil L. Contovounesios wrote:
> Andreas Röhler <andreas.roehler@easy-emacs.de> writes:
>> When running
>> curl -L -H "Accept: text/html" http://dbpedia.org/resource/Earth
>> output stops at several times.
>
> Isn't this just because of long lines in the output?
> This is a well-known performance pitfall in Emacs.
I can reproduce the issue (in 27.1), and it seems to me that it's
all about that one paragraph of right-to-left text.
If I disable `bidi-display-reordering', I see no slow-downs.
Eli, I note that setting `bidi-paragraph-direction' in the buffer
(with bidi-display-reordering enabled) does not seem to have any
obvious effect. Setting it to `left-to-right', I still see
right-to-left movement through that portion of the text, and the
associated slowness. Is that expected?
I'll add that the line in question is not *especially* long
(2374 characters); however it does seem to be a significant factor,
as enabling longlines-mode eliminates the slowness around that text.
-Phil