Collecting elapsed time information gives you a broad
  measure of where your application is spending the most
  elapsed, or wall-clock, time. Elapsed time includes
  wait loops and other factors, both internal and
  external to your application, that affect how long
  it takes for your application to complete.

  To collect elapsed time information on your
  application:

  o  Compile and link your application with the PCA
     Collector

  o  Run your application. This causes the PCA Collector
     to take control of your application. PCA diplays the
     Collector main window on your screen.

  o  From the File pull-down menu, create a data file
     into which the Collector places performance data.

  o  Choose the Process Execution query category.

  o  Click on the elapsed time query.

  o  Click on Collect in the Collector main window.

  For information on displaying the results of the
  elapsed time data collection, you can refer to:

  o  The hardcopy manual, Guide to DIGITAL Performance
     and Coverage Analyzer for OpenVMS Systems

  o  The online help for the PCA Analyzer.