IMO the helper strategy in skin.Utils will never give us the best possible performance.

In TextLayout I added very aggressive caching mechanism to allow incremental changes.
For example, if you keep the same text and font, you can change the wrap width and text alignment a lot faster (as the heavy work to produces glyphs and advances is cached).

In the helper we flip the text and font every time. That wipes our caches.

The way I think this should be done would be something like this
static double computeTextWidth(Text labeledText, double wrappingWidth) {
  TextLayout layout = labeledText.getTextLayout(); //new API in Text, private or public...
  layout.setWrappingWidth(0);
  float width = layout.getBounds().width;
  if (wrappingWidth < width) {
layout.setWrappingWidth(wrappingWidth);
       width = layout.getBounds().width;
  }
   layout.setWrappingWidth(labeledText.getWrappingWidth());//restore
  return width;
}


Not sure this code is 100% correct, but by re-using the internal TextLayout from Text we don't have to set the font and text (which preserve glyphs and advances).