How to unsort a model

[David Rosal <david 3r gmail com>]

Hello.

I experience a serious performance problem when trying to append 
a large number of rows (~ 10.000) to a sorted model.

I think that the problem is that the model is sorted, and so 
each time a row has to be appended the previously appended rows 
must be traversed in order to find the place for the new one. I 
have concluded that after comparing the time spent to append 
rows when the model is sorted and the time spent when it is not, 
and that time varies from a few seconds to more than a minute.

So I definitely wanted to "cancel" sorting during the appending, 
and then "resume" sorting again. But I see no way to achieve 
that. Once you call set_sort_column() on all the 
TreeViewColumn's of a TreeView, and you have clicked at least 
once on the head of any column, then the underlying TreeModel 
remains sorted forever!

So, is there a way to tell a TreeModel to cancel sorting for a 
while?

Thanks.


__david