QSettings causes heavy I/O load on windows using the INI format

After the update from Qt5.3.2 to Qt5.4.0 I've recognized a very strong HDD load when I move or resize a widget (e.g. QMainWindow) while the widget stores the new values of pos() and size() via QSettings within the QWidget::resizeEvent(QResizeEvent *) and QWidget::moveEvent(QMoveEvent *) functions. QSettings is configured to use the INI format.

The I/O load is so high, that moving or resizing windows is no longer fluid.

Perhaps you want to say that it is better to store window settings only when the window is closed , but such an behavior I've not seen from Qt4 and Qt5 up to Qt5.3.2.

I've uploaded a simple QtCreator project. I'm not able to reproduce the problem on Kubuntu 14.10 with Qt5.4.0, it seems to be a problem on windows only, tested on Windows 7 and 8.1.