Repeater {
            model: itemCount
            SubItem {
                x: Math.floor(index / lineCount) * 90
                y: index % lineCount * 15
            }
        }

Item {
    height: 15
    width: 170
    Text {
        id: text1
        width: 80
        height: 15
        text: "ABCDE"
        ....
    }

    Text {
        id: text2
        // 1. no overlap : no memory leak
        //width: 88
        
        //  overlap <> no overlap : memory leak **
        width: 80

        // 2. always overlap : no memory leak
        //width: 40

        // 3. overlap <> no overlap another SubItem text : no memory leak
        //width: 170
        
        height: 15
         ...
    }

    Timer {
        interval: 25
        running: true
        repeat: true
        onTriggered: {
            text2.text = Math.floor(Math.random() * 65536 - 32768)
        }
    }
}