/**
  * Pre-cache page existence to speed up link generation
  *
  * @param Database $dbr Database connection
  * @param int $res Result pointer
  */
 public function preprocessResults($dbr, $res)
 {
     $batch = new LinkBatch();
     while ($row = $dbr->fetchObject($res)) {
         $title = Title::makeTitleSafe($row->namespace, $row->title);
         $batch->addObj($title);
     }
     $batch->execute();
     if ($dbr->numRows($res) > 0) {
         $dbr->dataSeek($res, 0);
     }
 }