title: Is building one large better than building small ~75-100 widgets
body: <p>Consider the case that I have 3 adjacent list view with each list view having a sized widget of some height. Each list view has around 24 child items. I'm trying to scale the widget using <code>onScaleUpdate</code> in <code>GestureDetector</code>.</p>
  <p>onScaleUpdate I want to change the height of each child item of all the 3 listviews.</p>
  <p>Is rebuilding all child better or should I rebuild the whole widget?</p>