Comment by pron

Of the general-purpose methods it does; that's is exactly what these collectors were invented for - not to carry all that overhead of malloc/free. I guess you could argue over the frequency of situations where it yields a significant boost. It's also true that malloc/free have also improved, especially in the very large runtimes (like TCMalloc and jemalloc), but they can't do all the optimisations moving collectors can.