[Wayland-bugs] [Bug 99225] Fedora 25: Wayland causes gnome-shell's CPU usage to increase, and spike when moving the cursor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99225

            Bug ID: 99225
           Summary: Fedora 25: Wayland causes gnome-shell's CPU usage to
                    increase, and spike when moving the cursor
           Product: Wayland
           Version: 1.5.0
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: wayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: pointedstick at zoho.com

I'm running Fedora 25 + GNOME 3.22 + Wayland on a 2016 HP Spectre x360 (Kaby
Lake).

With X, gnome-shell usually idles at 0-22% of one processor core and using the
trackpad barely increases this, if at all.

With Wayland, gnome-shell usually idles at 0-8% of one processor core and when
I use the trackpad, gnome-shell immediately spikes in CPU and memory usage.
Screen recording attached.

Note: the screen recording exacerbates the problem to a huge extent; when I'm
*not* recording, drawing circles with the trackpad spikes gnome-shell to about
30-40% of one processor core, and gnome-shell idles at 0-8%. When screen
recording, these increase to not 250% and 50%, respectively. But still, 30-40%
of one processor core seems very high for just moving the cursor around.

This seems to be a Wayland issue since it entirely disappears when logging into
an X session. I'm happy to collect any required information.

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