[Gtk2hs-users] Two questions about the treeview in ModelView module

[pierric <w.p...@gm...>]

Hi, everyone.
In my current project, I use gtk2hs to build the GUI. But I meet a few
problems. Following two is about the TreeView.
1. TreeView has a function named treeViewGetModel to achieve the TreeModel
data. But there seems no way to covert this model into the concrete ones,
such as TreeStore. This problem make the program a bit tougher, for I have
to store the TreeStore somewhere. So I wonder why not just let the
treeViewGetModel return the TreeStore structure?
2. I find updating the TreeStore is quite unefficient. On some occasion, I
have to clear the whole treeStore and set a new forest which have over 80000
nodes. I update the treestore with following statements:
do MV.treeStoreClear store
   mapM_ (uncurry $ MV.treeStoreInsertTree store []) (zip [0..] forest)
I find that it method takes over 5 seconds, and over 150MB memory. This
realy astonished me. Could someone point me a better way?

Thank you very much, and best regards.
pierric.wu