Bug 137176 It takes unacceptable long time to render a report
Description: Get the attached report design, preview in report designer. It takes unacceptable long time to render a report, and users could not get the output finally. Even during the rending, the computer could not do anything else.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/context/ViewerAttributeBean.java
String reportConfigName = this.reportDesignName.replaceFirst(
				IBirtConstants.SUFFIX_DESIGN_FILE,
				IBirtConstants.SUFFIX_DESIGN_CONFIG );
		
		SessionHandle sessionHandle = DesignEngine.newSession( ULocale
				.getDefault( ) );
		ReportDesignHandle handle = null;
		try
		{
			this.configMap = new HashMap( );
			
			handle = sessionHandle.openDesign( reportConfigName );
			
			if ( handle != null )
			{
				Iterator configVars = handle.configVariablesIterator( );
				while ( configVars != null && configVars.hasNext( ) )
				{
					ConfigVariableHandle configVar = (ConfigVariableHandle) configVars
							.next( );
					if ( configVar != null && configVar.getName( ) != null )
					{
						
						String paramName = getParameterName( configVar
								.getName( ) );
						if ( paramName != null && paramName.length( ) > 0 )
						{
							this.configMap
									.put( paramName, configVar.getValue( ) );
						}