bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Rudi C]

pixel-scroll-mode has severe performance issues with some popular
modelines, as documented on:

- https://github.com/seagle0128/doom-modeline/issues/199

- https://github.com/syl20bnr/spacemacs/issues/11549

- https://www.reddit.com/r/emacs/comments/8rml8f/emacs_26_pixelscrollmode_gcs_like_theres_no/

Is this unsolvable? pixel-scroll-mode is critical when one works with
inline images, such as an org-mode workflow where notes are taken using
screenshots. I have tried some alternative non-pixel-scrolling
workarounds, but they aren't in the end usable enough for me.

I am open to experimenting with forks such as
https://github.com/emacs-ng/emacs-ng if they do have this feature.


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bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Eli Zaretskii]

> From: Rudi C <rudiwillalwaysloveyou@gmail.com>
> Date: Wed, 12 May 2021 16:07:35 +0430
> 
> pixel-scroll-mode has severe performance issues with some popular
> modelines, as documented on:
> 
> - https://github.com/seagle0128/doom-modeline/issues/199
> 
> - https://github.com/syl20bnr/spacemacs/issues/11549
> 
> - https://www.reddit.com/r/emacs/comments/8rml8f/emacs_26_pixelscrollmode_gcs_like_theres_no/

Can you tell why you think pixel-scroll-mode is the culprit, and not
those enhanced mode-lines?  Why not ask the developers of those
mode-lines to take a look and find out why they make pixel-scroll-mode
so slow, as opposed to the default mode-line?

In any case, the profiles shown in these reports doesn't seem to point
to any problems with core facilities related to mode-line, so I'm
uncertain how to proceed with investigating this.  Would it be
possible for you or someone else to come up with a recipe starting
from "emacs -Q" and loading as few 3rd-party packages as possible,
ideally none at all?

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Lars Ingebrigtsen]

Rudi C <rudiwillalwaysloveyou@gmail.com> writes:

> pixel-scroll-mode has severe performance issues with some popular
> modelines, as documented on:
>
> - https://github.com/seagle0128/doom-modeline/issues/199

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

According to that URL, this is still a problem in the current Emacs
(possibly), but as Eli says, if we're to make any progress here,
somebody will have to come up with a minimal test case that reproduces
the problem.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Lars Ingebrigtsen <larsi@gnus.org> writes:

> According to that URL, this is still a problem in the current Emacs
> (possibly), but as Eli says, if we're to make any progress here,
> somebody will have to come up with a minimal test case that reproduces
> the problem.

Rudi, does `pixel-scroll-precision-mode' also have this problem?

Most people whose hardware permits them to use that say it is vastly
superior to the original `pixel-scroll-mode', both in terms of behavior
and performance.

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Rudi C]

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Does `pixel-scroll-precision-mode` also work on macOS? If so, I'll install
emacs 29 and report back the results.

On Tue, Jul 12, 2022 at 6:36 AM Po Lu <luangruo@yahoo.com> wrote:

> Lars Ingebrigtsen <larsi@gnus.org> writes:
>
> > According to that URL, this is still a problem in the current Emacs
> > (possibly), but as Eli says, if we're to make any progress here,
> > somebody will have to come up with a minimal test case that reproduces
> > the problem.
>
> Rudi, does `pixel-scroll-precision-mode' also have this problem?
>
> Most people whose hardware permits them to use that say it is vastly
> superior to the original `pixel-scroll-mode', both in terms of behavior
> and performance.
>

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bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Rudi C]

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`pixel-scroll-precision-mode` seems to work well. I guess we can close this
issue.

On Tue, Aug 16, 2022 at 8:18 PM Rudi C <rudiwillalwaysloveyou@gmail.com>
wrote:

> Does `pixel-scroll-precision-mode` also work on macOS? If so, I'll install
> emacs 29 and report back the results.
>
> On Tue, Jul 12, 2022 at 6:36 AM Po Lu <luangruo@yahoo.com> wrote:
>
>> Lars Ingebrigtsen <larsi@gnus.org> writes:
>>
>> > According to that URL, this is still a problem in the current Emacs
>> > (possibly), but as Eli says, if we're to make any progress here,
>> > somebody will have to come up with a minimal test case that reproduces
>> > the problem.
>>
>> Rudi, does `pixel-scroll-precision-mode' also have this problem?
>>
>> Most people whose hardware permits them to use that say it is vastly
>> superior to the original `pixel-scroll-mode', both in terms of behavior
>> and performance.
>>
>

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bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Rudi C <rudiwillalwaysloveyou@gmail.com> writes:

> Does `pixel-scroll-precision-mode` also work on macOS? If so, I'll
> install emacs 29 and report back the results.

Yes, it does.  It works on every platform currently supported by Emacs
as long as your hardware supports it.

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Rudi C <rudiwillalwaysloveyou@gmail.com> writes:

> `pixel-scroll-precision-mode` seems to work well. I guess we can close this issue.

Thanks, closing.  pixel-scroll-precision-mode also has some knobs that
let it work with a regular mouse.  They don't work very well yet, but
once I clean them up we can probably obsolete (or at least rename) the
old pixel-scroll-mode to avoid confusion.

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Stefan Kangas]

Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text
editors" <bug-gnu-emacs@gnu.org> writes:

>> `pixel-scroll-precision-mode` seems to work well. I guess we can
>> close this issue.
>
> Thanks, closing.  pixel-scroll-precision-mode also has some knobs that
> let it work with a regular mouse.  They don't work very well yet, but
> once I clean them up we can probably obsolete (or at least rename) the
> old pixel-scroll-mode to avoid confusion.

Is there any reason why `pixel-scroll-precision-mode' doesn't just
replace `pixel-scroll-mode'?

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Eli Zaretskii]

> Cc: Lars Ingebrigtsen <larsi@gnus.org>, 48377@debbugs.gnu.org
> From: Stefan Kangas <stefankangas@gmail.com>
> Date: Wed, 17 Aug 2022 03:37:32 -0700
> 
> Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text
> editors" <bug-gnu-emacs@gnu.org> writes:
> 
> >> `pixel-scroll-precision-mode` seems to work well. I guess we can
> >> close this issue.
> >
> > Thanks, closing.  pixel-scroll-precision-mode also has some knobs that
> > let it work with a regular mouse.  They don't work very well yet, but
> > once I clean them up we can probably obsolete (or at least rename) the
> > old pixel-scroll-mode to avoid confusion.
> 
> Is there any reason why `pixel-scroll-precision-mode' doesn't just
> replace `pixel-scroll-mode'?

Yes, I'm that reason.

bug#48377: 27.1; pixel-scroll-mode is unusable with popular modelines

[Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors]

Stefan Kangas <stefankangas@gmail.com> writes:

>> Thanks, closing.  pixel-scroll-precision-mode also has some knobs that
>> let it work with a regular mouse.  They don't work very well yet, but
>> once I clean them up we can probably obsolete (or at least rename) the
>> old pixel-scroll-mode to avoid confusion.
>
> Is there any reason why `pixel-scroll-precision-mode' doesn't just
> replace `pixel-scroll-mode'?

I thought I explained why: it doesn't work with a mouse out-of-the-box.