/**
     * Calculate total throughput in MB/s based on total time
     *
     * @param totalTimeSeconds total elapsed time in seconds
     * @return throughput in MB/s
     */
    public double getThroughputMBps(double totalTimeSeconds) {
        if (totalTimeSeconds <= 0.0) {
            return 0.0;
        }
        return (bytesTransferred.get() / 1024.0 / 1024.0) / totalTimeSeconds;
    }

    /**