interpreter persistence issues

[Jeff Horwitz]

i'd like to have an option in mod_parrot to clear all user-generated data 
(globals, namespaces, subs, etc.) from an interpreter, leaving any 
bytecode that has been loaded (e.g. compilers).  the point here is to 
eliminate problems caused by data persistence on hosted web servers, which 
is one of several reasons why many hosting companies don't offer mod_perl. 
the persistence might even cause problems with pipp/PHP, as it's not 
expected for data to persist, so this is something mod_parrot needs to 
support.

i'm sure we'd have to provide some significant hints to whatever routine 
is doing the dirty work, but before i even start to look at this, is it 
even possible with our current architecture?  can we get close?

-jeff