1 files changed, 7 insertions, 1 deletions
diff --git a/include/functions_notification.inc.php b/include/functions_notification.inc.php
index 623369915..bc4d1a374 100644
--- a/include/functions_notification.inc.php
+++ b/include/functions_notification.inc.php
@@ -441,8 +441,13 @@ function news($start=null, $end=null, $exclude_img_cats=false, $add_url=false)
  */
 function get_recent_post_dates($max_dates, $max_elements, $max_cats)
 {
-  global $conf, $user;
+  global $conf, $user, $persistent_cache;
 
+  $cache_key = $persistent_cache->make_key('recent_posts'.$user['id'].$user['cache_update_time'].$max_dates.$max_elements.$max_cats);
+  if ($persistent_cache->get($cache_key, $cached))
+  {
+    return $cached;
+  }
   $where_sql = get_std_sql_where_restrict_filter('WHERE', 'i.id', true);
 
   $query = '
@@ -493,6 +498,7 @@ SELECT
     }
   }
 
+  $persistent_cache->set($cache_key, $dates);
   return $dates;
 }