A lot of those deallocations should be easy to figure out by a compiler, though. Maybe the JVM can accommodate a delete instruction? If I say list(1,2,3).par.ma

A lot of those deallocations should be easy to figure out by a compiler, though. Maybe the JVM can accommodate a delete instruction? If I say list(1,2,3).par.map(x=>x*x) there's a couple of intermediate objects that can immediately be deallocated. The GC shouldn't be bothered with cases that are so obvious.