Bug 102285 [Import/Export] Project Import wizard unusably slow
R3.1 I wanted to create a new 3.2 workspace and import some projects from my 3.1 development workspace which contains around 120 plug-ins. I've set the root of the importer to point at those plug-ins. After letting the wizard scan my disk for over 10 minutes I gave up and did it manually. A possible source for the problem might be that the root directory (as expected) contains a .metadata directory with tons of data (in my case) and that this one is fully scanned.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
*            The provider for the parent file
	 * @param entry
	 *            The root directory of the project
	 * @return A list of all files in the project
	 */
	protected boolean getFilesForProject(Collection files,
			IImportStructureProvider provider, Object entry) {
		List children = provider.getChildren(entry);
		Iterator childrenEnum = children.iterator();
		while (childrenEnum.hasNext()) {
			Object child = childrenEnum.next();
			
			
			files.add(child);
			
			
			if (provider.isFolder(child))
				getFilesForProject(files, provider, child);
		}
		return true;
	}
	/**
	 * Execute the passed import operation. Answer a boolean indicating success.
	 */
	protected boolean executeImportOperation(ImportOperation op) {
		
		try {
			getContainer().run(true, true, op);
		} catch (InterruptedException e) {
			return false;