[Webkit-unassigned] [Bug 116525] New: High utilization of system resources[especially RAM] while playing HTML 5 video

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116525

           Summary: High utilization of system resources[especially RAM]
                    while playing HTML 5 video
           Product: WebKit
           Version: 420+
          Platform: Macintosh
        OS/Version: Mac OS X 10.8
            Status: UNCONFIRMED
          Severity: Critical
          Priority: P2
         Component: Media Elements
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: shyjut.09 at gmail.com


Overview:
----------------------
High utilization of system resources[especially RAM] while playing HTML 5 video.

Steps to Reproduce:
----------------------
[code] 
#include "mainwindow.h"
#include <QApplication>
#include <QWebView>
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QString Url1  = "http://www.quirksmode.org/html5/videos/big_buck_bunny.mp4";
    QWebView view1;
    view1.show();
    view1.setUrl(QUrl(Url1));
    return a.exec();
}
[\code]

Actual Results:
----------------------
On running above qt program, qtapp launches and the video playback start . 
Observed system becoming slow. Checked the resource usage using "Activity Monitor" app. The free RAM size continue to decrease as the playback proceeds. After around 30-35 sec of playback free RAM as low as 6 MB. Before starting the QT application the Free RAM was around 2.1 GB.QT app fails to respond to user inputs.

Observation:
---------------
System become responsive once the full  video is buffered which is reflected in the progressbar.

Expected Results:
---------------------
Video playback should not consume so much system resources that application fails to respond to user inputs.

Build Date & Platform:
-----------------------
Tried with QT 5.0.2 and QT 5.0.1 . OS : MAC OSX 10.8.3

Additional Information:
-------------------------
Didn't observe this issue playing the HTML5 video content with flash plugin in windows.

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