WIP: Add ability to group keys by atomics
The previous implementation of vtkm::worklet::Keys used a parallel sort to group common keys together. Some recent R&D has suggested that it is faster to use atomics in a table of possible keys.
The previous implementation of vtkm::worklet::Keys used a parallel sort to group common keys together. Some recent R&D has suggested that it is faster to use atomics in a table of possible keys.