From: Ben Darnell <ben@bendarnell.com>
Date: Wed, 3 Aug 2011 06:47:55 +0000 (-0700)
Subject: If a PeriodicCallback runs longer than its period, skip the missed callbacks
X-Git-Tag: v2.1.0~60
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7aec8fc9b3e969eb7a345aefd689501035d967dd;p=thirdparty%2Ftornado.git

If a PeriodicCallback runs longer than its period, skip the missed callbacks
instead of trying to run all the missed callbacks to catch up.
---

diff --git a/tornado/ioloop.py b/tornado/ioloop.py
index 7e7da905d..7d31480a0 100644
--- a/tornado/ioloop.py
+++ b/tornado/ioloop.py
@@ -461,7 +461,9 @@ class PeriodicCallback(object):
 
     def _schedule_next(self):
         if self._running:
-            self._next_timeout += self.callback_time / 1000.0
+            current_time = time.time()
+            while self._next_timeout < current_time:
+                self._next_timeout += self.callback_time / 1000.0
             self.io_loop.add_timeout(self._next_timeout, self._run)