How to accelerate a widgets rendering?

[Voronar]

Hello everyone!

I've been searching for a method to accelerating of WebView (WebEngineView) widget rendering in order to use more faster Web Canvas API in result.
I've tried "this method":http://doc.qt.digia.com/qq/qq26-openglcanvas.html, but I didn't get the desired result.
It's my code:
@#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QGLWidget>

int main(int argv, char **args)
{
QApplication app(argv, args);
QGraphicsScene scene;

QWebView* webkit = new QWebView;
webkit->load(QUrl("http://www.smashcat.org/av/canvas_test/"));

scene.addWidget(webkit);
QGraphicsView view(&scene);

view.setViewport(new QGLWidget(QGLFormat(QGL::DoubleBuffer)));
view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
view.show();
return app.exec();
}@

In result I have low FPS (70 avg) value of web-canvas test in my qt-app.
A result of the same test in google chrome is 180 avg.
Furthermore I tried to implement QGLWidget based class. I got the same low FPS.

Are there any ways to accelerate the widgets rendering?

P.S. My working PC configuration:
OS: Ubuntu 14.04 32-bit
Memory: 1,9 GiB
Processor: Intel® Core™2 Duo CPU E7600 @ 3.06GHz × 2
Graphics: Intel® G45/G43 x86/MMX/SSE2

[msue]

You can try to use QGraphicsView::MinimalViewportUpdate instead of FullViewportUpdate, or SmartViewportUpdate.

You can also try to use the new class QOpenGLWidget of Qt 5.4.

[Voronar]

First variant hasn't been helped.
I tried to implement QGLWidget and new version. May be I did something wrong because there are few examples of widgets accelerating with OpenGL.