with g:  4 wallclock secs ( 3.91 usr +  0.00 sys =  3.91 CPU)
   with gi:  4 wallclock secs ( 3.64 usr +  0.00 sys =  3.64 CPU)
    with i:  7 wallclock secs ( 6.40 usr +  0.01 sys =  6.41 CPU)
 with none:  6 wallclock secs ( 6.77 usr +  0.00 sys =  6.77 CPU)