[Bug 155921] New: Large analog clock widget takes up too much CPU

[Alec Moskvin]

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http://bugs.kde.org/show_bug.cgi?id=155921         
           Summary: Large analog clock widget takes up too much CPU
           Product: plasma
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: panel-devel kde org
        ReportedBy: alecm_88 yahoo com


Version:            (using Devel)
Installed from:    Compiled sources
Compiler:          gcc 4.1.2 
OS:                Linux

I recently had an idea of placing a large analog clock widget as my background. The problem is, any time it changes, the CPU usage spikes to 100%.

How to reproduce:
1. Add an analog clock widget to the corner of the screen.
2. Click the options button and check "show seconds".
3. Drag the resize button to the opposite corner.
4. Check the CPU usage.

Result:
Plasma is very unresponsive, the clock skips every other second, CPU usage is at 100% (Plasma takes up approximately 50% and X takes up the rest).


It seems that the drawing of the clock is very inefficient, considering that all the effects and animations run very smoothly on my machine.

I have an Intel Core 2 Duo T5300 processor (1.73 GHz), an NVIDIA GeForce Go 7300 graphics card, and 2 GB of RAM.