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

[Arnold Krille]

On Wednesday 26 August 2009 14:26:08 Kenneth Beck wrote:
> 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?

If there are only few entries in the model, test your app with "valgrind --
tool=callgrind" to see where the time is spent.

Have fun,

Arnold
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