https://bugs.kde.org/show_bug.cgi?id=394206

            Bug ID: 394206
           Summary: taskbar : slow workflow because of slow animations
                    when window grouping is enabled
           Product: plasmashell
           Version: 5.12.5
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Task Manager
          Assignee: h...@kde.org
          Reporter: k...@web.de
                CC: plasma-b...@kde.org
  Target Milestone: 1.0

Created attachment 112620
  --> https://bugs.kde.org/attachment.cgi?id=112620&action=edit
video of (1.), slow animation

This is not a glitch but a ui design issue.

I'm talking about the taskbar that shows icons alongside window titles. See
attached video.

When switching between windows of an application that has multiple windows,
which are grouped together, two types of windows can show up.

1. When you click on the application tab, a window appears that lists all
windows. An animation shows a window sliding upwards.

2. When you hover the application tab, after a timeout an animation displays.
The animation shows a fade in effect of the info window. (The timeout is only
applied the first time the mouse enters the taskbar, so in principle it's
possible to instantly show the info.)

The animation in (1.) slows down the workflow in KDE plasma, because you have
to wait for it to finish before you can switch between windows.
The timeout and animation in (2.) slows down the workflow, because you have to
wait for both to finish before you can read the info.

When you attempt reading the text of the window that is sliding upwards (1.)
whilst it's moving, you can't actually read it.

I can't find an option to disable the animations or speed them up. The timeout
(2.) can't be removed.

Disabling the window grouping is the only way to instantly switch to a window.
I would prefer to use the grouping, though.

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