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From: jan via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 48871@debbugs.gnu.org
Subject: bug#48871: 27.2; Unusably slow in C# mode
Date: Sun, 6 Jun 2021 14:34:19 +0100	[thread overview]
Message-ID: <CADJx9Lev25ELhoE+B2at=it6uzfwet8V_JFFsLqc4ugojCVgJA@mail.gmail.com> (raw)
In-Reply-To: <835yyri2f2.fsf@gnu.org>

Hi Eli,
had already tried the -Q option. Emacs started but when I tried "M-x
csharp-mode" it didn't recognise it. I tried exactly the same on the
normally-started emacs to check I was entering it correctly and that
did understand it.
I guess the -Q effectively disables some modes? I was surprised.

Yep, customisation may well  be the issue here.

I have a file of equivalent size which should demo the issue but can't
zip it as gmail blocks anything with a zip attached, I can post as
attachment directly but it's 220KBytes, you ok with that on your
mailing list?

cheers

jan


On 06/06/2021, Eli Zaretskii <eliz@gnu.org> wrote:
>> Date: Sun, 6 Jun 2021 13:32:09 +0100
>> From:  jan via "Bug reports for GNU Emacs,
>>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
>>
>> C# mode is slow beyond to the point of being completely unusable. This
>> seems to have started when I upgraded from emacs 26 to emacs 27.2. The
>> file is ~220K. At the start of the file, typing takes 3 or 4 secs *per
>> character* to appear (at the end of the file, instantaneous). It's
>> forcing me to use visual studio to do all simple text editing and I
>> don't like that.
>> [...]
>> Turns out emacs has a profiler, thought I'd try it.
>
> Good start, thanks.
>
>> Not sure what to do.
>
> Post an example of a file where typing lags by several seconds, and
> let's see what people here can tell about that.
>
> But before that, start "emacs -Q", visit the C# file that gave you
> such trouble, and try typing there.  If the lag disappears, then look
> for some of your customizations that could explain the slow responses.
>





  reply	other threads:[~2021-06-06 13:34 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-06 12:32 bug#48871: 27.2; Unusably slow in C# mode jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-06-06 12:49 ` Eli Zaretskii
2021-06-06 13:34   ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2021-06-06 13:50     ` Eli Zaretskii
2021-06-06 14:53       ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-06-06 17:00         ` Eli Zaretskii
2021-06-06 18:00           ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-06-06 18:08             ` Eli Zaretskii
2021-06-06 18:22               ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2021-06-06 19:27                 ` Alan Mackenzie
2021-06-09 11:06                   ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors

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