Version:           unspecified (using KDE 4.7.0) 
OS:                Linux

Assuming that kmail uses the "general" KDE progress bar this is a KDE issue. If it's a kmail2 issue, please re-assign.

Reproducible: Always

Steps to Reproduce:
- Check xorg's cpu consumption

- Open kmail2 and watch the bottom-right corner of the app, i.e. the status bar.
- Make kmail2 perform several tasks at once in order to not get the x% progress bar but a simple little rectangle moving from side to side.

- Check xorg's CPU consumption while the rectangle is moving

Actual Results:  
Xorg consumes 8% of a 2.1 GHz dual core CPU just for a tiny little rectangle moving from side to side.

Expected Results:  
Hardly any cpu consumption for such a trivial animation.

There were issues in digikam with it using paint() for the "progress circles", i.e. those dots turning. Maybe this issue is also due to using not well performing painting methods.