mqtt 第一次发送数据延迟比较大

 $mqtt = new Workerman\Mqtt\Client('mqtt://XXXXXX.1883', $options);
    //$mqtt = new Workerman\Mqtt\Client('mqtt://119.3.165.220:1883', $options);
    $mqtt->onConnect = function() use ($mqtt, $file_name) {
        var_dump("mqtt connect ok");        
    };