1. Create a new Qt Quick 2 Application project.
2. Add some JavaScript to main.qml.
   I used:

   import QtQuick 2.0
   
   Rectangle {
       width: 360
       height: 360
       Text {
           text: qsTr("Hello World")
           anchors.centerIn: parent
       }
   
       Timer {
           interval: 2000
           repeat: true
           running: true
           onTriggered: {
               var i;
               for (i = 1; i < 2500; ++i) {
                   var j;
                   j = i * i;
                   console.log(j);
   
               }
           }
       }
   
       MouseArea {
           anchors.fill: parent
           onClicked: {
               Qt.quit();
           }
       }
   }
   

3. Configure the project to use a Qt version between 5.0.0 and 5.1.2.
4. Build the project.
5. Run the application in QML Profiler for about 10 seconds.
   I frequently get results like the following:

   Location	Time in Percent	Total Time	Self Time in Percent	Self Time	Details
   main.qml:15	100.32 %	1.277 s	100.00 %	1.273 s	onTriggered
   <program>	100.00 %	1.273 s	0.00 %	0.000 µs	Main Program

"100.32 %"? Looks strange to me.