cache router url

gistfile1.diff

diff --git a/lib/Cake/Routing/Router.php b/lib/Cake/Routing/Router.php
index cb28f6e..c6a38c3 100644
--- a/lib/Cake/Routing/Router.php
+++ b/lib/Cake/Routing/Router.php
@@ -810,23 +810,30 @@ class Router {

                        $url += array('controller' => $params['controller'], 'plugin' => $params['plugin']);

-                   $match = false;
+                 $cacheKey = 'Router-' . sha1(serialize($url));
+                 $cacheConf = Cache::settings('_cake_route_');
+                 if( empty($cacheConf) || ($output = Cache::read($cacheKey, '_cake_route_') ) === false ){
+                         $match = false;

-                   for ($i = 0, $len = count(self::$routes); $i < $len; $i++) {
-                           $originalUrl = $url;
+                         for ($i = 0, $len = count(self::$routes); $i < $len; $i++) {
+                                 $originalUrl = $url;

-                           if (isset(self::$routes[$i]->options['persist'], $params)) {
-                                   $url = self::$routes[$i]->persistParams($url, $params);
-                           }
+                                 if (isset(self::$routes[$i]->options['persist'], $params)) {
+                                         $url = self::$routes[$i]->persistParams($url, $params);
+                                 }

-                           if ($match = self::$routes[$i]->match($url)) {
-                                   $output = trim($match, '/');
-                                   break;
+                                 if ($match = self::$routes[$i]->match($url)) {
+                                         $output = trim($match, '/');
+                                         break;
+                                 }
+                                 $url = $originalUrl;
+                         }
+                         if ($match === false) {
+                                 $output = self::_handleNoRoute($url);
+                         }
+                         if(!empty($cacheConf)) {
+                                 Cache::write($cacheKey , $output, '_cake_route_');
                                }
-                           $url = $originalUrl;
-                   }
-                   if ($match === false) {
-                           $output = self::_handleNoRoute($url);