On Sat, Nov 26, 2011 at 3:02 PM, Chris Muller <asqueaker@gmail.com> wrote:

Compact classes cannot be made uncompact in a Cog+JIT VM.

Not exactly true.  Certain classes cannot be uncompacted.  These are as defined by

    StackInterpreter>>#checkAssumedCompactClasses

and the ones that can't be uncompacted are

Array

LargeNegativeInteger

LargePositiveInteger

Float

MethodContext

There is a performance advantage to being able to identify instances of these classes from the compact class index.

But any other classes should be able to be compacted and uncompacted.

Can compact classes be made uncompact when running the StackInterpreter VM?

It is exactly the same story.  The same classes are assumed to be compact in the StackInterpreter VM as the CoInterpreter VM.

Thanks.

HTH

--
best,

Eliot