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/ide/IDEApplication.java
* Return true if a valid workspace path has been set and false otherwise.
     * Prompt for and set the path if possible and required.
     * 
     * @return true if a valid instance location has been set and false
     *         otherwise
     */
    private boolean checkInstanceLocation(Shell shell) {
        
        Location instanceLoc = Platform.getInstanceLocation();
        if (instanceLoc == null) {
            MessageDialog
                    .openError(
                            shell,
                            IDEWorkbenchMessages.IDEApplication_workspaceMandatoryTitle,
                            IDEWorkbenchMessages.IDEApplication_workspaceMandatoryMessage);
            return false;
        }
        
        if (instanceLoc.isSet()) {
            
            
            if (!checkValidWorkspace(shell, instanceLoc.getURL()))
                return false;
            
            
            try {
                if (instanceLoc.lock()) {
                    writeWorkspaceVersion();
                    return true;
                }