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Performance Tools

Various Issues.

• Accuracy.
  • Sampling techniques yield less accurate results than counters or timers (clock accuracies!).
• Simplicity.
  • Automatic data collection (little or no programmer intervention).
• Flexibility.
  • Extension to collect additional data or provide different views.
• Intrusiveness.
  • Data collection may affect program behavior.
• Abstraction.
  • Examination of data at a level of abstraction appropriate for programming model.