Actually,it was for auto-vectorization. Given the data structure and algorithm used it wasn't feasible. And ended up proposing gather-scatter scatter-gather in

Actually,it was for auto-vectorization. Given the data structure and algorithm used it wasn't feasible. And ended up proposing gather-scatter scatter-gather in software as though different math involved for different geometries, it is still embarrassingly parallel, but not for single simulated collision events. And it was for GEANT to take advantage of future hardware and increase instructions per clock where memory bandwidth is a problem: http://geant.cern.ch/ http://geant.cern.ch/