[Webkit-unassigned] [Bug 256123] New: [GTK] Constant CPU usage on autoplaying video after pausing it

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=256123

            Bug ID: 256123
           Summary: [GTK] Constant CPU usage on autoplaying video after
                    pausing it
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nekohayo at gmail.com
                CC: bugs-noreply at webkitgtk.org

Test case: https://interbrand.com and its autoplaying video, since Epiphany 44.2 defaults to allowing muted autoplaying video.

1. Load that page. See the video playing.
2. Pause video playback using their pause button next to the unmute button.

Result: with WebKitGTK 2.40.1 and GStreamer 1.22.2, even on a modern 8-logical-CPUs 8th-generation Intel Kabylake CPU+GPU running on Wayland with triplebuffering, even with playback paused, CPU usage continues at 35 to 50% of all cores, and the cores stay clocked around 2.4-2.5 GHz instead of going back down to 800 Mhz.

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