Inserting emoji into Text Edit is a lot slower the more emoji it contains

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    TextEdit {
        id: te
        anchors.top: parent.top
        anchors.left: parent.left
        anchors.right: parent.right
        wrapMode: TextEdit.Wrap

        height: Math.max(te.contentHeight, 100)
        font.pixelSize: 20
    }

    Timer {
        id: timer
        interval: 20
        repeat: true

        property int currentEmojiCount: 0
        property int totalCount: 200
        property var inputs: [] <- Here put you're own emoji. Jira was not able to create ticker with them...

        onTriggered: {
            ++currentEmojiCount
            if (currentEmojiCount < 200) {
                var idx = Math.ceil(Math.random() * inputs.length)
                var input = inputs[idx]
                te.insert(te.length, input)
            } else {
                timer.stop()
            }
        }
    }

    Text {
        id: counterText
        anchors.bottom: parent.bottom
        anchors.left: parent.left
        anchors.right: parent.right

        text: timer.currentEmojiCount
        color: "blue"
        font.pixelSize: 40
        verticalAlignment: Text.AlignVCenter
        horizontalAlignment: Text.AlignHCenter
    }

    Component.onCompleted: {
        timer.start()
    }
}