, MarkStega wrote

As for the xaml designer, I'd say it is the worst performer and frequently crashes. 

I love when drag a button onto the XAML designer and all cores of your processor spike like you're encoding video right before you get into a "Designer process terminated unexpectedly!" spiral (I assumed it was creating a dump file or something but the processor spikes well before I get the process terminated error). 

I almost never use the XAML editor these days though.  Sounds about like I remember it though.