Concerning pattern statistics, the new FMCI algorithms appear to outperform the existing ones ([17]) in all possible ways: far easier to implement, more numerical stability, less memory requirements, as fast as SR for simple words (except in the M0 case, but this is due to a poor implementation of this particular case in FMCI approach) and dramatically faster (up to 1 000 times and more) for degenerated patterns. Even if the SR algorithms remain available in the SPatt package, FMCI ones are now used by default for exact computations.