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

[Benjamin Meyer]

QTableView can scale much larger and faster then QListView can.  I  
have an application that has 101,000,000+ rows inside of a QTableView  
with no scroll or startup problems, while this would not be possible  
in a QListView.  You can always use a QTableView and just turn off the  
headers if you just want a classic vertical list ala QListView.

http://benjamin-meyer.blogspot.com/2006/10/netflix-prize-contest.html

The scroll at the end sounds fishy.  I would profile to see if that is  
a issue in your code or Qt.  If it is a regression I would file a bug  
with Nokia/Trolltech

-Benjamin Meyer


On Aug 25, 2009, at 1:50 PM, 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
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