fucntion compute_total_times became more efficient.

theano/compile/profiling.py

@@ -295,17 +295,19 @@ class ProfileStats(object):
         return rval
 
     def fill_node_total_time(self, node, total_times):
-        if node not in total_times.keys():
-            total = self.apply_time[node]
-            for parent in node.get_parents():
-                if parent.owner in self.apply_time.keys():
-                    total += self.get_node_total_time(parent.owner)
-            total_times[node] = total
+        total = self.apply_time[node]
+        for parent in node.get_parents():
+            if parent.owner in self.apply_time.keys():
+                if parent.owner not in total_times.keys():
+                    self.fill_node_total_time(parent.owner, total_times)
+                total += total_times[parent.owner]
+        total_times[node] = total
 
     def compute_total_times(self):
         rval = {}
         for node in self.apply_time.keys():
-            self.fill_node_total_time(node, rval)
+            if node not in rval:
+                self.fill_node_total_time(node, rval)
         return rval
 
     def op_callcount(self):