Bug ID: 391800
           Summary: KWin gets low performance on intel hd620@1920x1080
                    when compositor is on.
           Product: kwin
           Version: 5.12.3
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: compositing
  Target Milestone: ---

I'm using archlinux with I5-7200U(using modesetting ddx driver).
When I enable compositor(opengl 3.1, and opengl2 is also),  kde's animation
will be laggy(about 50fps).And other application's animation will also be
laggy(e.g.: chrome's scroll animation) , but when I disable compositor, their
animation will be smooth.
I also have a intel hd4000 device, it doesn't have this issue. hd4000 can run
kde with very smooth animation on 1920x1080. But hd620's performance is much
better than hd4000's.

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