MPI Summation Routine in global NIFTy namespace?
Currently, nifty6.minimization.metric_gaussian_kl contains valuable MPI routines like the summation routine of !512 (merged) and _shareRange.
Currently I am working on an MPI operator using MPI allreduce summation and used to import _allreduce_sum_field and _shareRange directly from the KL file for development purposes.
Now that !512 (merged) removed the former, should we make the new summation routine general again and include it in the global namespace?
@mtr: would that be feasible without a large effort?
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