Testing Robot Web Services response time

We are working on a project where communication between Python and RWS is done through REST API and the requests package. We have looked at using the package Locust to test the response time for each request, but not really sure wether this is a good, or even a right way to test such a thing. What we want to know is how fast can a request be processed, wether that is manipulating a rapid variable, robtarget or requesting mastership. Is there a good way to do this, or do you think the Locust package with 1 user is enough for calculating this.

I can try to provide more info if needed.

Thank you