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Application performance is no longer a free lunch, and with current hardware trends of cores-for-the-chores, the search is on for the programming model that will make your application scale out over all the processing units that you have. Java 5 and Java 6 have given us the goodness of java.util.concurrent, and if all things go well, we will have Fork/Join (FJ) as part of Java 7. All of these are layers of abstraction built on top of the native threading model that makes programming with threads easier for the masses.