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- in many cases the local communicator has the same communication pattern for several timesteps so it can be reused instead of being recreated. Avoids repeated MPI_Comm_free()/MPI_Comm_group() calls - STYLE: eliminate bitSet intermediate when determining the sub-ranks
- in many cases the local communicator has the same communication pattern for several timesteps so it can be reused instead of being recreated. Avoids repeated MPI_Comm_free()/MPI_Comm_group() calls - STYLE: eliminate bitSet intermediate when determining the sub-ranks