[Interest] qml performance with Qt5.2

[Nancy Zou]

Dear All
I know Qt5.2 have a big performance increase, but I don't find my qml application have some performance increase compared with Qt5.0.
I write some of my qml like that:
Rectangle {
id: rect
width: 800
height: 480
color: "green"
visible: true
 Text {
   color: "black"
   text: "a test"
   opcity:1
    SequentialAnimation on opacity
            {
              loops: Animation.Infinite^M
                PropertyAnimation { to: 1; duration: 5000 }
            }
   }
Rectangle {
  id: rect1
  width: 200
  height: 200
  color: "red"
  opacity:0
}
}

Sometimes I want some item invisible, so I set opacity to 0. But I know visible: false can make item invisible too. Which one should better to choose?
If the opacity is 0, does the item still drawing? I suspect it's why my qml can't run good on Qt5.2.
I want to ask how to write a good qml  file to make full use of Qt5.2 optimization.

Thank you.
Best Regards
Nancy



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