The row index changes few times in comparison to the number of times data
is called. Reduce the number of times your code instances a new object by
caching the object and creating a new one only when the row index changes.
Something like:
QVariant data(const QModelIndex &index, int role) override
{
static int lastRow = -1;
static QScopedPoint<MyDataClass> lastObj;
if (lastObj.isNull() || index.row() != lastRow) {
lastRow = index.row();
lastObj.reset(createDataForRow(lastRow);
}
/Stan
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