vtkDIYGhostCellsUtilities: speeding up index mapping
In some instances in the code, using a std::vector is faster than
using a std::set or std::unordered_map, because no queries are being
performed as the container gets filled.
In some instances in the code, using a std::vector is faster than
using a std::set or std::unordered_map, because no queries are being
performed as the container gets filled.