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
displayErrorDialog(DataTransferMessages.ZipImport_couldNotRead);
		}
		archivePathField.setFocus();
		return null;
	}
	/**
	 * Display an error dialog with the specified message.
	 * 
	 * @param message
	 *            the error message
	 */
	protected void displayErrorDialog(String message) {
		MessageDialog.openError(getContainer().getShell(),
				getErrorDialogTitle(), message);
	}
	/**
	 * Get the title for an error dialog. Subclasses should override.
	 */
	protected String getErrorDialogTitle() {
		return IDEWorkbenchMessages.WizardExportPage_internalErrorTitle;
	}
	/**
	 * Collect the list of .project files that are under directory into files.
	 * 
	 * @param files
	 * @param directory
	 * @param monitor
	 *            The monitor to report to
	 * @return boolean <code>true</code> if the operation was completed.
	 */