Performance of QDataStream

[drizzt]

Hi all,

i would like to know if somebody knows about how fast QDataStream can write into a file?
( in MByte / second )

QFile file("test.txt");
    QDataStream out(&file);
    out.setByteOrder(QDataStream::LittleEndian);
    file.open(QIODevice::WriteOnly);
 
    QString s = "";
 
    // 8mb string
    for(int i = 0; i < 8388608; i++)
    {
        s.append("o");
    }
 
    QByteArray b = s.toLocal8Bit();
 
    // writing 1GB data in the file
    for(int i = 0; i < 256; i++)
    {
        out << b
 
    }

QFile file("test.txt");
    QDataStream out(&file);
    out.setByteOrder(QDataStream::LittleEndian);
    file.open(QIODevice::WriteOnly);

    QString s = "";

    // 8mb string
    for(int i = 0; i < 8388608; i++)
    {
        s.append("o");
    }

    QByteArray b = s.toLocal8Bit();
    
    // writing 1GB data in the file
    for(int i = 0; i < 256; i++)
    {
        out << b

    }

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in this test i get a datarate of ~90 MByte/sec.

Is there any way to improve the speed or has anybody information about QDataStream's speed?

Thanks