Thanks for the answer. But is this actual behaviour for the GCs of the JDK? I was certain that at the very least Hotspot makes use of stack allocation as much as possible.

But perhaps the JDK GCs don't care so much about the stack because that is already dealt by the JVM a step prior? In any case, there will likely still be young objects allocated in the heap and this new algorithm might prove useful.

But you can tell I am far from an expert here.