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
this.parent = parent;
			this.level = level;
			this.provider = entryProvider;
			setProjectName();
		}
		/**
		 * Set the name of the project based on the projectFile.
		 */
		private void setProjectName() {
			IProjectDescription newDescription = null;
			try {
				if (projectArchiveFile != null) {
					InputStream stream = provider
							.getContents(projectArchiveFile);
					newDescription = IDEWorkbenchPlugin.getPluginWorkspace()
							.loadProjectDescription(stream);
					stream.close();
				} else {
					IPath path = new Path(projectSystemFile.getPath());
					newDescription = IDEWorkbenchPlugin.getPluginWorkspace()
							.loadProjectDescription(path);
				}
			} catch (CoreException e) {
				
			} catch (IOException e) {
				
			}
			if (newDescription == null) {
				this.description = null;
				projectName = "";