After some experimenting I can get over 10% perfromance improvement with
window operations when fillStyle; borderStyle; hResizing; vResizing are
made as instance variables of Morph, rather than going through extension.
 
I thought Marcus has mentioned this some time ago, but no progress?
 
There is obviously an issue with name collision/shadowing but not many methods in core need changing to accomodate.
 
Whilst on the subject I am wondering on everyone's opinion on merging the behaviour of color/borderColor/borderWidth with that of fillStyle... sure to be some gains there!

Regards, Gary