> You can already do that in any GC language (to some extent) by drastically reducing the amount and creation/destruction-frequency of garbage collected objects (for instance by reducing "object granularity" and using object pools).

Or allocating on the stack (just mind the size of the allocation and the current depth of the stack). Common Lisp offers the DYNAMIC-EXTENT declaration for that: http://www.ai.mit.edu/projects/iiip/doc/CommonLISP/HyperSpec...