This version optimizes the Faust item access (F[i,j] in pyfaust, F(i,j) in matfaust). Take a look at the following figure to get an idea of the speedup.
N.B.: Although this optimization speeds up the Faust element indexing, please note that the use of this Faust operation in algorithms is still discouraged because contrary to matrix element indexing which is performed by a direct memory access, for a Faust it needs some calculations.
