ments on the horizon will not automatically enhance that value. As a result, many computer systems under development are betting on the ability to exploit multiple processors and alternative forms of parallelism in place of the traditional increases in the performance of individual computing nodes. To make good on that bet, there need to be substantial breakthroughs in the software-engineering processes that enable the new types of computer systems. Moreover, attention will probably be focused on high-level performance issues in large systems at the expense of time to market and the efficiency of the virtuous cycle.



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