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The paper focuses on comparison of the efficiency of various formulations of BiCGStab iterative methods in the parallel computations. The analytical execution time model, based on the volume of data transfers with the memory, is presented. The corresponding model predictions are validated with results of the calculations. The proposed model is used to compare the performance of the classical BiCGStab and Pipelined BiCGStab method formulations. The obtained model predictions and simulation results are compared with results of other authors.
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