I have a ProgressBar with ProgressBar.IsIndeterminate=True to notify the user of ongoing operations.
The way I use it now I display it with Visibility=Visible and hide it with Collapsed.
Now my question is: Will WPF stop rendering completely or will I still have some power going into animating the ProgressBar?
It will stop rendering as far as i know. You can run a stress test by putting n progress bars in a dialog, the CPU load should be heavy if they are
Visibleand gone completely whenCollapsed.