Comment (by Zach Etienne):

After the patch, the profiling of AHFinderDirect improves significantly:

• AHFinderDirect_find_horizons: ~56% → ~69% of total AHFinderDirect runtime
• AHFinderDirect_import_mask: ~31% → 18% of total AHFinderDirect runtime
• AHFinderDirect_store: ~13% → ~13% of total AHFinderDirect runtime

Note that I’m running with 8 MPI ranks and 12 (OpenMP) cores per rank.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2853/ahfinderdirect_import_mask-needs-an-openmp