QML sorting in tableview is very slowly

Question

I use QML TableView + own QAbstractTableModel and QSortFilterProxyModel. I've implemented sorting, but it works slowly. I've used these models without QML, but with QTableView - it worked perfectly. 30 000 items sort less then 1 secs. Can anybody help? Where problem is?

Answer 1

I've supposed that QML repaint all items while Model is sorting data (in every iteration). I've found solution, for sorting you have to:

1. Turn off model in QML
2. Sorting items (use model)
3. Return back model.

For example

onSortIndicatorOrderChanged: {
    model = null
    MyModel.Sort(...)
    model = MyModel
}

More details https://forum.qt.io/topic/52026/solved-sorting-qml-tableview-is-slow/4