Initial delay when moving Slider

import QtQuick 2.4
import QtQuick.Controls 1.3
import QtQuick.Window 2.2

Window {
    width: 640
    height: 480
    visible: true


    Rectangle {
        width: 150
        height: 24
        anchors.centerIn: parent

        Slider {
            id: zoomSlider
            anchors.fill: parent
            minimumValue: 1
            maximumValue: 10000
            stepSize: 1

            onValueChanged: console.log("value", value);
        }
    }
}