How to delete the instance (or release the memory) created by Repeater

[obt-young]

I haven't found a way to release the memory alloced by the Repeater.
Anyone could tell me how to delete the instance (or release the memory) created by Repeater.
Thanks in advance.

[J.Hilk]

@obt-young

just a guess, as you don't show any code

function clearRepeater(){
     myRepeater.model = undefined
     gc()
}

Column {
    Repeater {
       id:myRepeater
        model: ["apples", "oranges", "pears"]
        Text { text: "Data: " + modelData }
    }
}

[obt-young]

Thanks for you reply.
I try your method in a example code as follows:

import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Controls 1.4


Window {
    visible: true
    width: 300
    height: 300
    title: qsTr("Hello World")

    Grid{
        anchors.fill: parent
        spacing: 10

        Repeater{
            id:rp
            model:3
            delegate: Component{
                Rectangle{
                    id:rc
                    color:"red"
                    width: 20
                    height: 20
                }
            }
        }
    }

    Button{
        id:rebtn
        anchors.bottom: parent.bottom
        anchors.right: parent.right
        width: 20
        height: 20
        text:"-"
        onClicked: {
            rp.model = undefined
            gc()
        }
    }

    Button{
        anchors.bottom: parent.bottom
        anchors.right:rebtn.left
        width: 20
        height: 20
        text:"+"
        onClicked: {
            rp.model=3
        }
    }
}

It seems doesn't work , the memory increased every time i click the "+" button , but does not decrease when i click the "-" button

[J.Hilk]

@obt-young
2 points.

• How to you monitor the memory increase ?
• The GC is unreliable, even when manually called. The nature of JS...

[raven-worx]

@obt-young said in How to delete the instance (or release the memory) created by Repeater:

delegate: Component{
Rectangle{
id:rc
color:"red"
width: 20
height: 20
}
}

i don't know if thats the cause of the behavior you are seeing, but normally you do not need to wrap your delegate item in a Component.
Also you can try to log the delegate's destruction to make sure if it actually gets deleted or not.

delegate: Rectangle{
        id:rc
        color:"red"
        width: 20
        height: 20

        Component.onDestruction: console.log("Repeater delegate destruction")
    }

If you can see this message your delegate items are destroyed and your memory increase comes from somewhere else in your code.