code: def _fast_permalink(self):
          
          if hasattr(self, 'link_id'):  # from /r or /u comments page
              sid = self.link_id.split('_')[1]
          else:  # from user's /message page
              sid = self.context.split('/')[4]
          return urljoin(self.reddit_session.config['comments'], '{0}/_/{1}'
                         .format(sid, self.id))
docs: Return the short permalink to the comment.