Implementing static cache at jquery_drawer_get_children()

1 files changed, 9 insertions, 0 deletions

diff --git a/jquery_drawer.module b/jquery_drawer.module
index 7283fcd..682e506 100644
--- a/jquery_drawer.module
+++ b/jquery_drawer.module
@@ -147,6 +147,12 @@ function theme_jquery_drawer($menu) {
  * Render all nodes whose terms are children of $tid.
  */
 function jquery_drawer_get_children($tid = NULL) {
+  static $cache = array();
+
+  if (isset($cache[$tid])) {
+    return $cache[$tid];
+  }
+
   $vid   = variable_get('jquery_drawer', '1');
   $terms = taxonomy_node_tree_taxonomy_get_tree($vid, $tid);
 
@@ -168,8 +174,11 @@ function jquery_drawer_get_children($tid = NULL) {
     $nodes = db_query(db_rewrite_sql($query), implode(',', $filter));
     $tree  = taxonomy_node_tree_build($nodes, $terms);
 
+    $cache[$tid] = $tree;
     return $tree;
   }
+
+  $cache[$tid] = NULL;
 }
 
 /**