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/CacheMapManager.java
{
	
	
	
	private FolderUtil folderUtil;
	private String tempDir;
	private static Integer cacheCounter1 = new Integer( 0 );
	private static Integer cacheCounter2 = new Integer( 0 );