one requested 0.400000  diff 0.400195 seconds
two requested 0.200000  diff 0.200170 seconds
one requested 0.200000  diff 0.200124 seconds
two requested 0.400000  diff 0.400223 seconds
one requested 0.000000  diff 0.000039 seconds
two requested 0.000000  diff 0.000060 seconds