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/service/ReportEngineService.java
{
			level = Level.FINEST;
		}
		else if ( "OFF".equalsIgnoreCase( logLevel ) ) 
		{
			level = Level.OFF;
		}
		config.setLogConfig( logDirectory, level );
		
		String scriptLibDir = servletConfig.getServletContext( )
				.getInitParameter( ParameterAccessor.INIT_PARAM_SCRIPTLIB_DIR );
		if ( scriptLibDir == null || scriptLibDir.trim( ).length( ) <= 0
				|| ParameterAccessor.isRelativePath( scriptLibDir ) )
		{
			scriptLibDir = servletConfig.getServletContext( ).getRealPath(
					"/scriptlib" ); 
		}
		ArrayList jarFileList = new ArrayList( );
		if ( scriptLibDir != null )
		{
			File dir = new File( scriptLibDir );
			getAllJarFiles( dir, jarFileList );
		}
		String scriptlibClassPath = ""; 
		for ( int i = 0; i < jarFileList.size( ); i++ )
			scriptlibClassPath += EngineConstants.PROPERTYSEPARATOR
					+ ( (File) jarFileList.get( i ) ).getAbsolutePath( );
		if ( scriptlibClassPath.startsWith( EngineConstants.PROPERTYSEPARATOR ) )
			scriptlibClassPath = scriptlibClassPath
					.substring( EngineConstants.PROPERTYSEPARATOR.length( ) );