Questions

1. Suppose a specific Unicon value, such as the null value, was particularly common when marking live data. Under what circumstances would it make sense to modify the PostDescrip() macro to check for that value to see if the tests in the Qual() and Pointer() macros can be avoided?
2. What would be the advantages and disadvantages of creating a separate heap region for each class type?
3. The reclaim() operation of Unicon's mark-and-sweep collector moves all the live non-garbage memory up to the top of the region. Would it be beneficial to modify this collector so that live data did not move?