Yeah totally! And this not only applies for deallocation, but also for allocation. A generational GC with bump allocation for the young generation can be much f

Yeah totally! And this not only applies for deallocation, but also for allocation. A generational GC with bump allocation for the young generation can be much faster than a naive C/C++ application using malloc for every single allocation. Of course you could use an arena in C/C++ to improve this, but it requires thinking ahead and it add some extra challenges to the design. A GC gives you this for free, you don't have to even think about it.