Re:Gordon: An open source Flash runtime written in pure Java...
by tedmielczarek on Thursday January 14, 2010 @11:29AM
(#1052921)
There's a lot more overhead to the plugin model, since the browser has to call to the plugin via NPAPI and the plugin has to draw itself separately, vs. just being integrated into the normal reflow/repaint of the webpage.
Probably both.