'get' is slower than 'pub/sub'

[pdematteis]

Hello,
I'm checking performances while using zenoh-c to establish communication between two devices.
For the purposes, I setup two different ping/pong tests: one is using a pub/sub approach, while the other do the same by using get/eval.
I measured 2ms RTT with pub/sub and 5ms with get/eval (payload size is 256 bytes).
Is this as expected? Is there a way to optimize the get pattern?
Thanks.