Inside a virtualenv, run this to install deps:
make deps
Then to run the app inside the server
make run
Then visit http://localhost:8000 a couple of times.
Hit ctrl-c.
The profile data is generated - for time inside your application only. The avoids cluttering your numbers with stuff about HTTP and gunicorn.
Then run
make snakeviz
To see what is, AFAIK the state of the art visualiser for Pythonland.