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As interest in the networking community turns to increasingly complicated networks run over increasingly long simulation times, performance differences in network simulators increasingly matter. Characteristics of concern include execution speed, size of model that can be simulated, and scalability - how those abilities change as the problem size and simulation engine increase in capability. In January 2002 a paper was published in the CNDS conference discussing the scalability of the simulation tool JavaSim, and that of ns2 SSFNet. Authors re-examine those experiments, and show that the experimental methodology does not increase intrinsic workload as the model size grows.
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