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-- Created a separate, limited interface MapResultsQueue object that previously was set to the PriorityBlockingQueue. -- The MapResultsQueue is now backed by a synchronized ExpandingArrayList, since job ids are integers incrementing from 0 to N. This means we avoid the n log n sort in the priority queue which was generating a lot of cost in the reduce step -- Had to update ReducerUnitTest because the test itself was brittle, and broken when I changed the underlying code. -- A few bits of minor code cleanup through the system (removing unused constructors, local variables, etc) -- ExpandingArrayList called ensureCapacity so that we increase the size of the arraylist once to accommodate the upcoming size needs |
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