Unable to change IMU stream rate

Thank you for your response, it was super useful.

I managed to change the stream rate with the set streamrate command.
However, it is a quite unpractical way of doing it, so i was wondering if you could point me to a start up script for Mavproxy, where the stream rate could be set as default with the
-- streamrate option ?

You stated in this forum, that:

Is this because the ArduSub code uses IMU data which slows down communication?

Thank you for your time,
best regards,
Rasmus