QStandardItemModel: any efficient way to add a batch of items?

问题

Is there any efficient way to add a batch of QStandardItems to a model? The model is being cleared and then I'm adding a lot of items. QtreeWidget has addTopLevelItems ( const QList<QTreeWidgetItem *> & items ) for just this, how to optimize such addition with model / view architecture?

来源：https://stackoverflow.com/questions/19694316/qstandarditemmodel-any-efficient-way-to-add-a-batch-of-items