The use cases he cites are corner cases, as others have argued. In my mind, a far more common use case calls for memory pools, where memory can be allocated an

The use cases he cites are corner cases, as others have argued. In my mind, a far more common use case calls for memory pools, where memory can be allocated and not explicitly tracked by the application. The memory pool gets freed at the end of some unit of computation. This interface is already nicely supplied by an Apache memory pool library.