docs: def run(self):
          """
          generate <nreq> requests taking a random amount of time between 0 and 0.5 seconds
          """
          for i in xrange(self.nreq):
              req = '%s_%s' % (self.ident, i)
              pre_request(None, req)
              sleep(random() / 2)
              post_request(None, req)