[Webkit-unassigned] [Bug 189224] New: REGRESSION(r235165): [GStreamer] Major video performance regression

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189224

            Bug ID: 189224
           Summary: REGRESSION(r235165): [GStreamer] Major video
                    performance regression
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com
                CC: bugs-noreply at webkitgtk.org, pgriffis at igalia.com

r235165 "[CoordGraphics] Switch to Nicosia::CompositionLayer state tracking" has introduced a *very major* video performance regression that should be immediately noticeable e.g. when playing any video on YouTube. I can reproduce the same issue on http://download.blender.org/peach/bigbuckbunny_movies/big_buck_bunny_720p_stereo.ogg, which is a much simpler case than YouTube.

It's not straightforward to rollout due to many code changes in these files.

Fortunately, this commit is not on the 2.22 branch, so video playback in 2.21.92 is fine.

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