a little experiment with zmq polling

screenless/bureau/bureau.py

@@ -308,12 +308,21 @@ class Bureau(object):
         # register commands and api methods
         self._publish_methods()
 
+        poller = zmq.Poller()
+        poller.register(self._recv, zmq.POLLIN)
+
         while True:
             try:
-                msg = self._recv.recv_string(flags=zmq.NOBLOCK)
-            except zmq.ZMQError:
-                time.sleep(0.05)  # don't waste CPU
-                continue
+                msgs = dict(poller.poll(500))
+                if msgs:
+                    if msgs.get(self._recv) == zmq.POLLIN:
+                        msg = self._recv.recv_string(flags=zmq.NOBLOCK)
+                else:
+                    continue
+            #    msg = self._recv.recv_string(flags=zmq.NOBLOCK)
+            #except zmq.ZMQError:
+            #    time.sleep(0.05)  # don't waste CPU
+            #    continue
             try:
                 self.log.debug("got message:" + msg)
                 dot = msg.find(".")