Service bus performance using AMQP

Hi,

I am checking the performance of the service bus on the AMQP link.
Using qpid-proton-c 0.8 on my Linux machine Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz (8 cores) with 8 GB of memory, sending a message can take up to 200 milliseconds.
I was surprised by this performance. I was expecting a shorter delay (like 50 ms).
Is there a way to improve/optimize this performance?

Many thanks.