Published online by Cambridge University Press: 08 June 2023
This chapter introduces to the concepts of algorithm, model of computation, and computational resources, starting from the classic ones (time and space) and then moving to I/O complexity by introducing the two-level memory model, which constitutes a simple, yet very effective, approximation of modern hierarchical memories. Examples are given in order to motivate the importance of counting I/Os for estimating the real performance of algorithms in modern computers.
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