Comments are rewrited more clearly.

theano/printing.py

@@ -129,10 +129,12 @@ Timing Info
 <total time>   time for this node + total times for this node's ancestors
 <% total time> total time for this node over total computation time
 
-N.B.: <total time> and <% total time> may over-count computation times
-if inputs to a node share a common ancestor and should be viewed as a
-loose upper bound. Their intended use is to help rule out potential nodes
-to remove when optimizing a graph because their <total time> is very low.
+N.B.: 
+* Times include the node time and the function overhead.
+* <total time> and <% total time> may over-count computation times
+  if inputs to a node share a common ancestor and should be viewed as a
+  loose upper bound. Their intended use is to help rule out potential nodes
+  to remove when optimizing a graph because their <total time> is very low.
 """
 
         debugmode.debugprint(r, depth=depth, done=done, print_type=print_type,