title: Python - Receive from Azure Service Bus Topic is very slow
body: <p>I am toying around with home automation, and I am planning to use Azure Service Bus as my "core" for message handling. With the .NET SDKs everything works perfectly and is fast enough (milliseconds for send + receive). However, I am now using the "azure.servicebus" module with Python (Debian on a Raspberry Pi), and the receive_subscription_message call is far from fast. It varies between near instant to lagging a minute behind.</p>
  
  <p>My code is as follows:</p>
  
  <pre><code>from azure.servicebus import ServiceBusService, Message, Queue
  bus_service = ServiceBusService(
      service_namespace='mynamespace',
      shared_access_key_name='Listener1',
      shared_access_key_value='...')
  msg = bus_service.receive_subscription_message('messages', 'ListenerTest.py', peek_lock=True)
  msg.delete()
  </code></pre>
  
  <p>I have toyed around with peek_lock True and False, but the behaviour is the same.</p>
  
  <p>Has anyone else been able to get this stable / near instant?</p>