Add a profile thing for a few runs.

callback_plugins/profile_tasks.py

@@ -0,0 +1,40 @@
+import time
+
+
+class CallbackModule(object):
+    """
+    A plugin for timing tasks
+    """
+    def __init__(self):
+        self.stats = {}
+        self.current = None
+
+    def playbook_on_task_start(self, name, is_conditional):
+        """
+        Logs the start of each task
+        """
+        if self.current is not None:
+            # Record the running time of the last executed task 
+            self.stats[self.current] = time.time() - self.stats[self.current]
+
+        # Record the start time of the current task
+        self.current = name
+        self.stats[self.current] = time.time()
+
+    def playbook_on_stats(self, stats):
+        """
+        Prints the timings
+        """
+        # Record the timing of the very last task
+        if self.current is not None:
+            self.stats[self.current] = time.time() - self.stats[self.current]
+
+        # Sort the tasks by their running time
+        results = sorted(self.stats.items(), key=lambda value: value[1], reverse=True)
+
+        # Just keep the top 10
+        results = results[:10]
+
+        # Print the timings
+        for name, elapsed in results:
+            print "{0:-<70}{1:->9}".format('{0} '.format(name), ' {0:.02f}s'.format(elapsed))