Ticket #21120: 21120.diff

wp-includes/pluggable.php

@@ -133 +133 @@
  * @return bool|object False on failure, WP_User object on success
  */
 function get_user_by( $field, $value ) {
+        static $cache = array();
         $userdata = WP_User::get_data_by( $field, $value );
 
         if ( !$userdata )
                 return false;
 
+        $key = $field . '|' . $value;
+        if ( isset( $cache[$key] ) )
+                return $cache[$key];
+
         $user = new WP_User;
         $user->init( $userdata );
 
-        return $user;
+        $cache[$key] = $user;
+        return $cache[$key];
 }
 endif;