That is why generational collectors are so good. It is not common to have huge blocks of memory than also happen to be short lived, and if you do have such a d

That is why generational collectors are so good. It is not common to have huge blocks of memory than also happen to be short lived, and if you do have such a design, you can probably refactor it (or just not use garbage collection there, which any production-grade programming environment should allow by some means).