Add bench marking tools/tests

[goodboy]

We need a reliable and consistent way to measure both python performance as well as FS performance as a load generator. A few approaches I can think of off-hand include:

• include cProfile wrapper scripts much like pytest does: https://github.com/pytest-dev/pytest/tree/master/bench for bench marking:
  • event loop
  • measurement collection
  • call generator burst loop
• create a test case which launches a SIPp uas with -rtp_echo enabled and run the Bert app to benchmark FS as a load generator.
  • Assuming SIPp can handle a lot of simultaneous RTP streams we should be able to find the breaking point of the FS caller.