[Qt-interest] Model/View speed of Models with many many items and item changes

[RZ]

> 
> As far as I know this means all the update signals are then send afterwards. 
> Which mean after changing 10.000 data points, instead of a continuous stream 
> of 10.000 dataChanged(index) signals, you will get them all after the signals 
> are unblocked again. 

Maybe I should look into the Qt source code first - but from my 
experience this isn't true. And in that special use case i only used it 
once when a new tab was opened and the data was loaded so I'd say for 
that simple case it's ok especially regarding effort and effect.