Profiler doesn't show line by line performance.

[nino-finch]

Describe the bug
The endpoint profiler stops showing the break down of my code performance after the first few call-stack. I'm expecting to see which function in my endpoint causes slowness, how performant my db or redis query is etc but none of them tracked by it.

Screenshots

To Reproduce
I just followed the install instruction and setup the default level configuration to 3

Desktop (please complete the following information):

• OS: MacOS
• Browser - Chrome
• FMD Version [v.3.0.7]

Additional context
I'm not sure if this is a bug or just not supported to begin with by this library. It'd be a huge bummer if the actual code by code profiler is not supported but thanks for building this anyway.

[nino-finch]

My screenshot above doesn't show what inside the thread.start() so adding it more here.

[Amedeo91]

Hello @nino-finch, I have the same issue with waiter. If you use the default debug server, it works fine. I guess it is because by using waiter the server is actually using multi-threading to support several requests in parallel while it is not the case with the debug server.

Do you have a proposal for that? The point where we need to improve is https://github.com/flask-dashboard/Flask-MonitoringDashboard/blob/master/flask_monitoringdashboard/core/profiler/stacktrace_profiler.py line 105 so that it fetches as the content of the thread and not the fact that the tread is running. Maybe it is enough to initialize the actual callback we write below @app.route here at line https://github.com/flask-dashboard/Flask-MonitoringDashboard/blob/master/flask_monitoringdashboard/core/measurement.py 171