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Qt WebKit causes performance issue/network traffic spike

  • I created a browser application using Qt WebKit 4.8.4. Out QA found the application triggers a network traffic spike on wireless network every 5-10 seconds. The VoIP call will drop because of the network traffic spike.

    I found the problem was from Qt WebKit - even the Qt WebKit example fancybrowser suffers the same problem. I did a test in the same environment with fancybrowser. When it is not running, ping to a server constantly takes less than 1 ms. But, when it is running, ping to a server takes 100 ms every 5-10 seconds. What fancybrowser does is just to create a QWebView, not even load anything yet (I disabled loading page in my testing).

    I wonder whether anyone has the similar experience and what the solution is.

    BTW, I tried QtWeb which uses Apple WebKiet and it seems to not have this issue. But if I compiled QtWeb source code with Qt 4.8.4, QtWeb has the same issue.

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