afair, the most important optimization there is that something can be allocated ... | Hacker News

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		sb on Oct 7, 2009 \| parent \| context \| favorite \| on: JDK7 to have escape analysis on by default...also ... afair, the most important optimization there is that something can be allocated on the stack instead of the heap, which is quite an optimization. EDIT: it does not actually have anything to do what you can stick in registers--at least nothing comes to my mind w/o thinking too hard about it... relevant papers directly from the hotspot-jvm are: -kotzmann, moessenboeck, "escape analysis in the context of dynamic compilation and deoptimization" http://www.usenix.org/events/vee05/full_papers/p111-kotzmann... -kotzmann, moessenboeck: "run-time support for optimizations based on escape analysis" http://ftp.ssw.uni-linz.ac.at/Research/Papers/Ko07/Ko07.pdf

slava_pestov on Oct 7, 2009 [–]

Actually, once you've figured out that you can stack allocate an object, you can stick its instance variables in registers. This can be a huge win.

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