Bug 180189 Support in memory data set cache.
Currently, Design-Time Data Cache is stored on disks. By performance tests using ramdisk, we found that caching in physical memory can improve the performance of RunAndRender by 30%.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/DataSetCacheManager.java
info.add( temp[1] );
		}
		String paraName, paraValue;
		Hashtable table = new Hashtable( );
		for ( int j = 3; j < split.length; j++ )
		{
			paraName = ( split[j].split( "=" ) )[0];
			paraValue = ( split[j].split( "\"" ) )[1];
			table.put( paraName, paraValue );
		}
		info.add( table );
		return info;
	}
	/**
	 * To get the ResultIterator from the configure file after executing query
	 * 
	 * @param list
	 * @param index
	 * @return the obtained ResultIterator
	 * @throws IOException
	 * @throws BirtException
	 * @throws ClassNotFoundException
	 */
	private IResultIterator getResultIterator( ArrayList list )
			throws IOException, BirtException, ClassNotFoundException
	{
		String sql = null;
		for ( int i = 0; i < list.size( ); i++ )
		{
			sql = getQualifiedSql( list, i, sql );