[rixed]

Java GC is only efficient if you allow it to be wasteful. I'm regularly running hundreds of different ocaml programs on a single machine and I trust ocaml GC to actually collect the garbage. I would not trust tens of java processes in default GC mode, which seems to be tuned for cases where a single process own the whole machine.

Hopefully, the multicore GC will be as good, or one will be able to disable multicore abilities when not in use (which is going to be most of the time, I believe)