StrongTalk

Strongtalk: A High-Performance Open Source Smalltalk

Strongly-typed, full rework of Smalltalk-80.
Advanced inlining type-feedback compiler makes it far faster than other Smalltalks, optional type system makes ...

http://www.strongtalk.org/

StrongTalk is meant to be the fast version of Smalltalk.
It's under development.
It crashed after toying 30 seconds with it. ;-(

Is it Up or Down grading Smalltalk ??