PHP dio_read taking taking 1 minute to execute each task

Question

We are trying to read data from com port using php. Currently it takes exactly one minute to execute each task. Is there a way to cut short this waiting period?

$bytesSent    = dio_write($bbSerialPort, $dataToReboot);



$runForSeconds = new DateInterval("PT10S"); //10 seconds
$endTime = (new DateTime())->add($runForSeconds);

echoFlush(  "Waiting for {$runForSeconds->format('%S')} seconds to recieve data on serial port" );

while (new DateTime() < $endTime) {

    $data = dio_read($bbSerialPort); //this is a blocking call

    if ($data) {
        echoFlush(  "Data Recieved: ". $data );
        $dataToBeep = pack("H*","020816000033C61B");// beep 3
        $bytesbeepSent    = dio_write($bbSerialPort, $dataToBeep);
        $databeep = dio_read($bbSerialPort);
    }
 }