[Qt-qml] 60fps QML_SHOW_FRAMERATE and paintevents

[Juha.Sarkijarvi at nokia.com]

Hi,

Have you tried measuring the frame rate in QML utilizing QML_SHOW_FRAMERATE environment variable.
QByteArray data = "1";
qputenv("QML_SHOW_FRAMERATE ", data);

If so, how the generated messages should be interpreted. Here is an example print out that I got.

[Qt Message] paintEvent: 2 time since last frame: 16
[Qt Message] paintEvent: 1 time since last frame: 16
[Qt Message] paintEvent: 2 time since last frame: 16
[Qt Message] paintEvent: 2 time since last frame: 16
[Qt Message] paintEvent: 2 time since last frame: 16
[Qt Message] paintEvent: 2 time since last frame: 16
[Qt Message] paintEvent: 1 time since last frame: 16
[Qt Message] paintEvent: 1 time since last frame: 16

What does the first number mean? If it means the number of paint events, why there are sometimes several paint events? I thought that there would be only one paint event per frame when running 60fps.

Best regards,
Juha
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