I found that my application consumes more and more CPU power it time when making a simple animation.

I wrote a simple program so everyone could check what am i talking about:

Qt Code: 
  1. import QtQuick 2.3
  2. import QtQuick.Controls 1.2
  3. import QtQuick.Window 2.2
  4.  
  5.  
  6. ApplicationWindow {visible: true; width: 640; height: 480;
  7.  
  8.     Window{  height: 100;  width: 100; visible: true; objectName: "w1"; id:w1;
  9.         Image{anchors.fill: parent;  source: sw?"qrc:/images/1":"qrc:/images/2"; }
  10.     }
  11.  
  12.     Window{  height: 100;  width: 100; visible: true; objectName: "w2"; id:w2;
  13.         Image{anchors.fill: parent;  source: sw?"qrc:/images/1":"qrc:/images/2"; }
  14.     }
  15.  
  16.         Window{  height: 100;  width: 100; visible: true; objectName: "w3"; id:w3;
  17.             Image{anchors.fill: parent;  source: sw?"qrc:/images/1":"qrc:/images/2"; }
  18.         }
  19.  
  20.     property bool sw: false;
  21.         Timer { interval: 30;running: true;repeat: true;
  22.             onTriggered:  {sw=!sw;}
  23.         }
  24.  
  25. }
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001.jpg

It happens only if animations is in few separate windows.
If i completely reload animated windows with Loader{}, everything resets and CPU load starts to increase from beginning.( but I can't use such quick fix in my program!)
If i reload only Image{} with Loader{}, it does not help.

It happens also if i creating custom QQuickPaintedItem in two or more QQuickWindows and calling them update() method. EVEN WITH NO ACTUAL DRAWING!!!

This issue was tested with Ubuntu 12.04+qt5.4.2+intel_video and ubuntu14.04+qt5.3.2+radeon_video.
I need a quick fix for this!!!

I had already tried to periodically call releaseResources() method and resetOpenGLState() method of QQuickWindow.

Can anyone test this issue or give me an advise?