int HYPRE_IJMatrixSetRowSizes (HYPRE_IJMatrix matrix, const int *sizes)

(Optional) Set the max number of nonzeros to expect in each row

Documentation

(Optional) Set the max number of nonzeros to expect in each row. The array sizes contains estimated sizes for each row on this process. This call can significantly improve the efficiency of matrix construction, and should always be utilized if possible.

Not collective.

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