title: How to calculating and testing the number of concurrent connections?
body: <p>Twisted server supports more than 10,000 concurrent connections. I want to write a test case to check it using Python.</p>
  
  <p>What I know is just using multiprocessing + threading + greenlet. My question is how to confirm Twisted's support for more than 10,000 concurrent connections? </p>
  
  <p>Something I know is using logger, but is logger accurate? Or has other way to calculate it?</p>