[Qt-interest] Why QListView is so slow and QTableView is fast?

[Kenneth Beck]

Sylvain Pointeau wrote:
> Hi,
> 
> I am testing QListView for a large number of items (36'000)...
> it is so sloooow (I stopped the application, it never shows up) .
> (yes I set UniformItemSizes to true)
> 
> I tried QTableView and it is immediate.
> However the scrolling become slow if we are viewing the last elements.
> 
> Please can someone give me some insights?
> 
> Cheers,
> Sylvain
> 
I am having a very similar problem with a QTableView. Once the model is 
filled and the user is just moving around the table, just moving from 
one cell to the other, or moving the scroll bar, takes a lot of time. 
Each call to the data() method requires a search into the model to find 
the data, but the model only contains a few 10's of items, it is not 
large. Does anyone know where to look for ways to speed this up? Are 
there some optimization tricks?