question about time-delay

[杜俊霖]

    Hello，I have some question when I use kafka transfer data。
    In my test，I create a producer and a consumer and test the time-delay from 
producer to consumer  with 1000 bytes data. It takes me about 3ms.
but when i ping to broker ,the time-delay is about 0.1ms.
    what configuration I can do to make sure the time-delay under 1ms when 
transfer data from producer to consumer. 
    best wishes!