Index: includes/menu.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/menu.inc,v
retrieving revision 1.392
diff -u -p -r1.392 menu.inc
--- includes/menu.inc	17 May 2010 18:47:25 -0000	1.392
+++ includes/menu.inc	21 May 2010 06:54:59 -0000
@@ -1699,13 +1699,20 @@ function menu_local_tasks($level = 0) {
     }
 
     // Get all tabs and the root page.
-    $result = db_select('menu_router', NULL, array('fetch' => PDO::FETCH_ASSOC))
-      ->fields('menu_router')
-      ->condition('tab_root', $router_item['tab_root'])
-      ->condition('context', MENU_CONTEXT_INLINE, '<>')
-      ->orderBy('weight')
-      ->orderBy('title')
-      ->execute();
+    $cid = 'local_tasks:' . $router_item['tab_root'];
+    if ($cached  = cache_get($cid, 'cache_menu')) {
+      $result = $cached->data;
+    }
+    else {
+      $result = db_select('menu_router', NULL, array('fetch' => PDO::FETCH_ASSOC))
+        ->fields('menu_router')
+        ->condition('tab_root', $router_item['tab_root'])
+        ->condition('context', MENU_CONTEXT_INLINE, '<>')
+        ->orderBy('weight')
+        ->orderBy('title')
+        ->execute()->fetchAll();
+      cache_set($cid, $result, 'cache_menu');
+    }
     $map = $router_item['original_map'];
     $children = array();
     $tasks = array();