I'm no expert on Sieve but I would probably rerun these simulations with the code compiled without '-g' which is the debugging option. See the following:
> > ########################################################## > # # > # WARNING!!! # > # # > # This code was compiled with a debugging option, # > # To get timing results run config/configure.py # > # using --with-debugging=no, the performance will # > # be generally two or three times faster. # > # # > ##########################################################
