What would be the most efficient (small size, less processor load) asset type to be used in a custom spark skin?
Specifically, a background skin-part for a spark component skin (for components like Button, SkinnableContainer ...)
1. FXG defined in mxml (mxml graphics)
2. FXG asset exported from photoshop / illustrator & referenced without re-editing in mxml
3. Embedded SWF movie-clip symbol with scale-9 (also, how much does scale-9 increase the file size?)
4. Embedded png with scale-9