I'm facing an increase on cpu usage when using MediaElement. The weird is that in one screen I use 4 small MediaElements and the cpu doesn't increase.
When I move to another screen where MediaElement is bigger, the cpu increase a little, but in a way that the controls in the screen behaves slowly, like when you click in a ComboBox, and it has a delay to show the items.
If I make the MediaElement smaller, the cpu usage does not increase.
The worst is that I've made a sample (you can download it here), but I couldn't reproduce.
I'm sure it is the MediaElement, because if I remove it from screen or make it smaller, the cpu does not increase.
Here is 2 pictures showing the size of the MediaElement:
CPU about 13~18
CPU about 19~23
Take a look at WPF FlashMessage
About.me