[Interest] debug scenegraph batching performance

I have a grid view that I want to optimize. I found that most of the cpu time is taken in rendering the gridview. I need to make sure scenegraph batches as many operations as possible. To do this, I set all the env variables suggested in docs like QSG_RENDERER_DEBUG=render, QSG_RENDERER_DEBUG=dump

[Interest] How to crop VideoOutput arbitrarily without setting clip true?

Is It possible in Qt 5.2 qml? The closest thing I can find is PreserveAspectCrop but I need to crop the video anywhere I like. I found a relevant question image cropping *[qt-project.org ]*. However I don’t prefer setting clip tr