>Um, I think I'm inventing my own notation.  By "so that A + B ~ B" ,   I meant "would the speed improvement from adding J5 and Strongtalk-types to Squeak, be approximately equal to the speed improvement from just adding J5 to Squeak".

I know.  Really, Ian would be the best person to answer this, and the StrongTalk folks would have a good sense too.

	- D

>>  Let's call the speed gains from typing a la StrongTalk, A, and let's call the speed gains from J5, B.
>>
>>Would J5 and  types together equal a speed improvement of A + B? Or does the stuff Ian is doing with J5 involve some kind of magic typing behind-the-scenes, so that A + B ~ B?