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
* @param monitor
	 *            The monitor to report to
	 * @return boolean <code>true</code> if the operation was completed.
	 */
	private boolean collectProjectFilesFromProvider(Collection files,
			ILeveledImportStructureProvider provider, Object entry, int level,
			IProgressMonitor monitor) {
		if (monitor.isCanceled())
			return false;
		monitor.subTask(NLS.bind(
				DataTransferMessages.WizardProjectsImportPage_CheckingMessage,
				provider.getLabel(entry)));
		List children = provider.getChildren(entry);
		if (children == null) {
			children = new ArrayList(1);
		}
		Iterator childrenEnum = children.iterator();
		while (childrenEnum.hasNext()) {
			Object child = childrenEnum.next();
			if (provider.isFolder(child))
				collectProjectFilesFromProvider(files, provider, child,
						level + 1, monitor);
			String elementLabel = provider.getLabel(child);
			if (elementLabel.equals(IProjectDescription.DESCRIPTION_FILE_NAME))
				files.add(new ProjectRecord(child, entry, level, provider));
		}
		return true;
	}
	/**
	 * The browse button has been selected. Select the location.