Input events slow on unity Update function

I have this running on the Update() on Unity. I am trying to create a page swipe feature on my game, but the problem is there is a half second delay when printing "dragging" to "end drag" when I release the mouse.

Does anyone have a method that will register input events faster?

void Update()
{
    if(isDragOn)
    {           
        if(Input.GetMouseButton(0))
        {
            print ("dragging");
            //moveContainers((Input.mousePosition.x - mouseLastPosition) * 0.01f);
            mouseLastPosition = Input.mousePosition.x;
        }
        else if(Input.GetMouseButtonUp(0))
        {
            print ("end drag");
            isDragMoved = false;
            isDragOn = false;
            endDrag();
        }
        else if(Input.touchCount > 0)
        {
            if(Input.GetTouch(0).phase == TouchPhase.Moved)
            {
                //moveContainers(Input.GetTouch(0).deltaPosition.x);
            }
            else if(Input.GetTouch(0).phase == TouchPhase.Ended)
            {
                isDragMoved = false;
                isDragOn = false;
                endDrag();
            }
        }
    }
}