More consistent use of combineReduce, simpler and/or reductions
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172- Mark OLESEN authored
DOC: document which MPI send/recv are associated with commType
returnReduce(list.size(), sumOp<label>())
in favour of returnReduceOr(list.size())
which is cleaner to write/understand and also marginally more efficientGeneral overview under https://develop.openfoam.com/Development/openfoam/-/wikis/coding/patterns/parallel
DOC: document which MPI send/recv are associated with commType