[Kst] [Bug 83391] New: Kst uses almost 100% cpu after applying fit plugin to large dataset

[Rick Chern]

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http://bugs.kde.org/show_bug.cgi?id=83391      
           Summary: Kst uses almost 100% cpu after applying fit plugin to
                    large dataset
           Product: kst
           Version: unspecified
          Platform: RedHat RPMs
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kst kde org
        ReportedBy: rchern interchange ubc ca


Version:           0.98-devel (using KDE KDE 3.2.1)
Installed from:    RedHat RPMs
Compiler:          gcc (GCC) 3.3.2 20031022  
OS:                Linux

After applying plugin to (200000 or so elements) large vectors, kst uses 100% cpu and becomes generally slow and unstable.

How to reproduce:

1. Create two large (200000 or so elements) vectors (gyrodata.dat can be used).  
2. Open the Data Manager, and create a plugin. Select a fit plugin (Fit exponential seems to cause particularly high usage). Select two different vectors as the X and Y vectors.
3. Click Apply as New.
4. Use "top" to check CPU usage of Kst.

Cpu usage will be 90% to 100%.  
After subsequent general use, kst will often crash.

Expected Behaviour:
Cpu usage should not be 90% to 100%.