[Bug 279583] New: Simple progress bar makes xorg consume 8% CPU of a 2.1 GHz dual core

[S. Burmeister]

https://bugs.kde.org/show_bug.cgi?id=279583

           Summary: Simple progress bar makes xorg consume 8% CPU of a 2.1
                    GHz dual core
           Product: kde
           Version: unspecified
          Platform: openSUSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: sven.burmeister at gmx.net


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.

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