code: function processIrcLines(irc_con, continue_processing) {
      if (irc_con.reading_buffer && !continue_processing) return;
      irc_con.reading_buffer = true;
  
      var lines_per_js_tick = 4,
          processed_lines = 0;
  
      while(processed_lines < lines_per_js_tick && irc_con.read_buffer.length > 0) {
          parseIrcLine(irc_con, irc_con.read_buffer.shift());
          processed_lines++;
          Stats.incr('irc.connection.parsed_lines');
      }
  
      if (irc_con.read_buffer.length > 0) {
          irc_con.setTimeout(processIrcLines, 1, irc_con, true);
      } else {
          irc_con.reading_buffer = false;
      }
  }
docs: Process the messages recieved from the IRCd that are buffered on an IrcConnection object
  Will only process 4 lines per JS tick so that node can handle any other events while
  handling a large buffer