InvokeHttp response time

[#1]

Hello, I have a Nifi flow which uses InvokeHttp processor. Is there some way I can find out the response time for the calls? I am interested in monitoring the response times of these calls InvokeHttp is making.

Adding an UpdateAttribute before & after the processor (to get the timestamps before & after, and finding the difference), doesn't work for me, as it takes the queue wait time into consideration(which I don't want to measure).

Any ideas?