Measuring and reporting performance

• Performance = 1/ Execution time

• Measuring performance:

  • Elapsed time
  • System CPU time
  • Unix time command : 90.7u 12.9s 2.39 65%
    (user) CPU time for program, OS time for program, Elapsed time, %(CPUtime/Elapsed time)
  • CPU Perf: user CPU time on unloaded system.
  • System Perf: Elapsed time on unloaded system.

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