3D scatter performance

[marky]

Hi,

I'm using Q3DScatter to visualize 3D data. In total, I want to display ~100.000 points with a frame rate of ~20Hz.
But I only achieve a frame rate of ~4 hz.
I use the Scatter example of QT creator as a starting point. I inserted a QTimer to create new data:

m_selectionTimer = new QTimer(this);
m_selectionTimer->setInterval(100);
m_selectionTimer->setSingleShot(false);
QObject::connect(m_selectionTimer, &QTimer::timeout, this,
                 &ScatterDataModifier::addData);
m_selectionTimer->start();

the displaying of data is stripped down to the following:

QScatterDataItem *ptrToDataArray = &m_dataArray->first();
for (int i = 0; i < m_itemCount; i++) {
    ptrToDataArray->setPosition(randVector());
    ptrToDataArray++;
}
m_proxy->resetArray(m_dataArray);

I guess this is the fastest way to update data, or do you have any hints to improve performance?

Thanks in advance for the help!