public function getRequestDuration(): float
    {
        if ($this->requestEndTime !== null) {
            return $this->requestEndTime - $this->requestStartTime;
        }

        return \microtime(true) - $this->requestStartTime;
    }
public function getRequestDuration(): float
    {
        if ($this->requestEndTime !== null) {
            return $this->requestEndTime - $this->requestStartTime;
        }

        return \microtime(true) - $this->requestStartTime;
    }
public function getRequestDuration ( ) : float { if ( $ this -> requestEndTime !== null ) { return $ this -> requestEndTime - $ this -> requestStartTime ; } return \ microtime ( true ) - $ this -> requestStartTime ; }
Returns the duration of a request.

@return float
Returns the duration of a request .