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The -XX:+DoEscapeAnalysis option directs HotSpot to look for objects that are created and referenced by a single thread within the scope of a method compilation. Allocation is omitted for such non-escaping objects, and their fields are treated as local variables, often residing in machine registers. Synchronization on non-escaping objects is also elided.
With this version of java -XX:+DoEscapeAnalysis results in far less gc activity and 14x faster execution.
With this version of java -XX:+DoEscapeAnalysis results in far less gc activity and 14x faster execution.