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Jak podano na innych grupach.

A.L.

For those of you who have heard of Strongtalk (or if you haven't,
but you care about dynamic optimization, performance in Smalltalk,
or type systems), there is great news today:

Sun Microsystems has at long last released the Strongtalk
virtual-machine as Open Source! This means the entire Strongtalk
project is now fully Open Source, under a basically unrestricted
Berkeley-style license, at http://www.strongtalk.org/.

As some of you may remember, Strongtalk was (and still is) the
fastest implementation of Smalltalk ever.  It also included the only
fully developed type-system for Smalltalk (use of which is optional,
and doesn't affect performance).  The VM is based on Urs Hölzle's
highly advanced type-feedback compiler technology, from the Self
project at Sun Labs.  It was developed in the mid-'90s by a startup,
Animorphic Systems,but was shelved when Sun bought Animorphic.  At
Sun the Animorphic team based the design of the current (HotSpot)
Java VM on the Strongtalk VM.   But Strongtalk sat on a shelf, not
quite finished.

In 2002, Sun released Strongtalk with a non-commercial binary of the
unfinished VM, with open source just for the associated
Smalltalk/Strongtalk libraries.  But without the VM source code to
allow finishing and maintaining the VM, Strongtalk couldn't go
anywhere, other than as a historical proof that you really can make
Smalltalk run very fast, and that you can put a static type-system
in Smalltalk without ruining the things that make Smalltalk great.

Now, with the release of the VM source code, there's nothing
stopping anyone from doing anything with the Strongtalk system, and
using it for basically any purpose.  This would also open the
possibility that other dynamic language implementations could borrow
from the technology.

To keep our feet on the ground, this is a very sophisticated,
complex system that is not fully finished, so there is a huge amount
of work required, by people with deep knowledge of VMs, to finish it
or adapt the technology to other VM
designs.  But before it was impossible.   Now, what happens is
entirely up to the community!

Many thanks to Gilad Bracha at Sun for persevering and making this
happen, to Sun for releasing it, and to Robert Griesemer for helping
figure out how to get the VM building again after 10 years on a
shelf.

-The Strongtalk Team

---------------------------------
P.S.  The Strongtalk system is a complex, uncompleted system with
*no support*, so please don't expect to be able to use it for real
applications or get end-user questions answered at this point.
Currently, the release is only good for demoing.  At the moment, we
mostly need virtual-machine experts who are interested in helping
get the system finished and usable.