[Webkit-unassigned] [Bug 24913] New: qtwebkit 4.5 uses cpu excessively when flash plugin is enabled and web-page containing flash banner is loaded

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=24913

           Summary: qtwebkit 4.5 uses cpu excessively when flash plugin is
                    enabled and web-page containing flash banner is loaded
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Major
          Priority: P2
         Component: Plug-ins
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: firuzkosimov at gmail.com


I use qtwebkit 4.5 on my application and qtwebkit 4.5 supports flash plugin.
When I enable flash plugin and navigate to a web-page with flash (youtube.com
or any other with flash banner) the cpu load jumps up to 40-70% and the
process-detail column "page fault delta" goes 30,000-60,000 every second. The
demo-browser that is shipped with qt 4.5 has the same problem.

The steps to reproduce: 
1)install qt 4.5
2)launch demo-browser from examples (notice cpu-load doesnt stay steadily when
you navigate to pages without flash)
3)navigate to youtube.com
4)The cpu usage jumps to 40-70% and it doesnt go down. "page fault delta" in
the process-detail column of task manager goes to 30,000-60,000 and stays at
such pace.

I guess the cpu load and "page fault delta" should not stay up that high during
viewing web-pages with flash elements.


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