ages, classes and stacks) remain at the
same place where they were.
Other inaccessible cells are reclaimed and linked to the free-lists.
No copying or compactification occurs during GC.
When a garbage cell is reclaimed, its neighbor is examined
whether it is also free,
and they are merged together to form a larger cell if possible.
This merging, however, is sometimes meaningless,
since <TT>cons</TT>, which is the most frequently called memory allocator,
requests the merged cell to be divided to the smallest