diff --git a/WebContent/OSRM.JSONP.js b/WebContent/OSRM.JSONP.js
index 3a337bd57..430fc8beb 100644
--- a/WebContent/OSRM.JSONP.js
+++ b/WebContent/OSRM.JSONP.js
@@ -26,6 +26,7 @@ OSRM.JSONP = {
 	callbacks: {},
 	timeouts: {},
 	timers: {},
+	durations: {},
 	
 	
 	// default callback routines
@@ -50,7 +51,7 @@ OSRM.JSONP = {
 				OSRM.JSONP.fences[id] = undefined;						// clean fence
 			}
 			
-//			OSRM.debug.log("[jsonp] timout handling: "+id);
+			OSRM.debug.log("[jsonp] timout handling: "+id+" "+ (new Date() - OSRM.JSONP.durations[id]) );
 		};
 		
 		// wrap callback function
@@ -66,7 +67,7 @@ OSRM.JSONP = {
 				OSRM.JSONP.fences[id] = undefined;						// clean fence
 			}
 			
-//			OSRM.debug.log("[jsonp] response handling: "+id);
+			OSRM.debug.log("[jsonp] response handling: "+id+" "+ (new Date() - OSRM.JSONP.durations[id]) );
 		};
 		
 		// clean DOM (unfortunately, script elements cannot be reused by all browsers)
@@ -83,6 +84,7 @@ OSRM.JSONP = {
 		
 		// start timeout timer
 		OSRM.JSONP.timers[id] = setTimeout(OSRM.JSONP.timeouts[id], timeout);
+		OSRM.JSONP.durations[id] = new Date();
 
 //		OSRM.debug.log("[jsonp] init: "+id);		
 		return true;
@@ -94,5 +96,6 @@ OSRM.JSONP = {
 		OSRM.JSONP.callbacks = {};
 		OSRM.JSONP.timeouts = {};
 		OSRM.JSONP.timers = {};
+		OSRM.JSONP.durations = {};
 	}
 };
\ No newline at end of file
diff --git a/WebContent/main.html b/WebContent/main.html
index c42a10374..02933f485 100644
--- a/WebContent/main.html
+++ b/WebContent/main.html
@@ -44,7 +44,7 @@ or see http://www.gnu.org/licenses/agpl.txt.
 
 <script src="OSRM.base.js" type="text/javascript"></script>
 <script src="OSRM.config.js" type="text/javascript"></script>
-<!-- <script defer="defer" src="OSRM.debug.js" type="text/javascript"></script> -->
+<script defer="defer" src="OSRM.debug.js" type="text/javascript"></script>
 
 <script src="OSRM.Browser.js" type="text/javascript"></script>
 <script src="OSRM.GUI.js" type="text/javascript"></script>