swoole cpu占用很高 porcess

 $SystemNoticeProcess = newSwooleProcess(function($process) use ($server) {
        });
        //推送系统通知SystemNotice
        $this->server->addProcess($SystemNoticeProcess);

 $SystemNoticeProcess = newSwooleProcess(function($process) use ($server) {
            sleep(1);  //cup降低最佳方案

        });
        //推送系统通知SystemNotice
        $this->server->addProcess($SystemNoticeProcess);

 $SystemNoticeProcess = newSwooleProcess(function($process) use ($server) {
            //获取队列长度
            $i = $this->redis()->llen('SystemNotice');
            //客户端连接数>=1
            if(count($this->server->connections)>=1) {
                    //获取第一个元素
                    $redis_list = $this->redis()->Lpop('SystemNotice');
                    if($redis_list) {
                        foreach ($this->server->connections as$conn) {
                            //$this->server->push($conn,json_encode(['type' => 'market','date' => $show_market_list]));
                            $this->server->push($conn, $redis_list);
                            //sleep(1)  //cup会有所降低，但依然很高
}
                    }
            }
            sleep(1);  //cup降低最佳方案

        });
        //推送系统通知SystemNotice
        $this->server->addProcess($SystemNoticeProcess);