one requested 0.400000  diff 0.400259 seconds
two requested 0.200000  diff 0.200178 seconds
one requested 0.200000  diff 0.200145 seconds
two requested 0.400000  diff 0.400165 seconds
one requested 0.000000  diff 0.000136 seconds
two requested 0.000000  diff 0.000173 seconds