[Interest] QTreeView expand/expandAll performance

[Marian Beermann]

Indeed, views query model data very often. If, for example, data() is
even mildly slow the performance impact can be drastic. If you cannot
work around that directly, try to use caches (e.g. QCache,
QContiguousCache).

On 26.09.2014 19:06, Paul Miller wrote:
> 
> Otherwise, I haven't had any performance issues with deep graphs at all. 
> Make sure your model is as efficient as possible though.
>