Execution time report

<p>Generation phase?  If we take a look at the order of events for generation (<a data-ipb='nomediaparse' href='http://www.eclipse.org/birt/documentation/integrating/scripting.php'>http://www.eclipse.org/birt/documentation/integrating/scripting.php</a>), you'll find the following:</p>
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<p><img src="http://www.eclipse.org/birt/img/documentation/integrating/eventgen.jpg&quot; alt="eventgen.jpg"></p>
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<p>First, we will save the start time in the <em>initialize </em>event.  We first need to detect which phase initialize is called because it's called twice, once for generation and another during rendering.</p>
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if(reportContext.getTaskType() == Packages.org.eclipse.birt.report.engine.api.IEngineTask.TASK_RUN){
reportContext.setGlobalVariable("startTime", new Date());
}
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<p>Second, we will take the time at the afterFactory event.  We'll calculate the difference between the end and start time, and save this in a persistent global variable.</p>
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var elapsedTime = new Date() - reportContext.getGlobalVariable ("startTime");
reportContext.setPersistentGlobalVariable ("reportRenderTime", elapsedTime.toString());

// This debugging is only available in commercial BIRT
//
// Messages will appear in the Eclipse > Error Log window
//
//var logger = java.util.logging.Logger.getLogger("birt.report.logger");
//logger.warning ( elapsedTime ); // Time in milliseconds

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<p>Finally, we'll insert a label into the report, and modify its <em>onRender </em>event.  We will write out the elapsed time in milliseconds in the label's text.</p>
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this.text = 'Report generation time (ms): ' + reportContext.getPersistentGlobalVariable("reportRenderTime");
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<p>This report was tested in OS BIRT 3.7.2, and in iHub 16.2.</p>
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