PPT Slide
Penalty for IJK Loop Order
IJK versus KIJ for all patch dimensions X,Y=(21,41,81); 41 levels throughout
Penalty for IJK decreases with increased length of minor dimension, X
Penalty is most severe for sizes typical of a DM patch
IJK is strongly favored by vector for adequate length of X
Surprise: vector prefers KIJ for short X; but an unlikely result once full physics