[Webkit-unassigned] [Bug 192982] [GTK] Garbled rendering on Youtube while scrolling under X11.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=192982

Alicia Boya García <aboya at igalia.com> changed:

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                 CC|                            |aboya at igalia.com

--- Comment #10 from Alicia Boya García <aboya at igalia.com> ---
(In reply to Miguel Gomez from comment #9)
> The excessive CPU usage is reproducible playing a normal video, both with
> and without AC. I've tested that it happens even if we are not painting the
> video frames at all, so I must be something inside gstreamer.
> 
> I see that while playing a youtube video with 1080p it's using all my system
> processors (8) at 20% each.
> 
> BTW, I'm using Fedora 29 as well. Maybe it's a decoding issue? Charlie,
> Calvaris, Alicia, any thoughts?

Software decoding video (especially VP9) is a parallelizable CPU intensive task, so there being a noticeable CPU usage is nothing unusual by itself.

Of course, the complex graphic pipeline WebKit introduces to render the video inside a webpage can also have an impact.

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