one requested 0.400000  diff 0.400193 seconds
two requested 0.200000  diff 0.200190 seconds
one requested 0.200000  diff 0.200333 seconds
two requested 0.400000  diff 0.400372 seconds
one requested 0.000000  diff 0.000034 seconds
two requested 0.000000  diff 0.000050 seconds