Bug 75130 [Workbench] Workbench could avoid re-reading feature ini's to speed startup
Build 3.0.1. This is a very small improvement, but it was large enough to show up on my list of potential optimizations. Essentially it avoids re-reading the feature INI's on startup. Our product has LOTS of feature plug-ins (103), so this adds up. Attached is the proposed change; it isn't sophisticated, essentially saying "if I had at least one tips and tricks / welcome page before, I probably have one now". To be more robust, the stored preference would have to be cleared on a -clean. The net savings on a 3GHz P4 / 2G RAM was 181ms for multiple warm runs. It obviously should be a tad larger for cold runs on a less performant machine.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/WorkbenchActionBuilder.java
* Returns the window to which this action builder is contributing.
     */
    private IWorkbenchWindow getWindow() {
        return window;
    }
    /**
     * Hooks listeners on the preference store and the window's page, perspective and selection services.
     */
    private void hookListeners() {
        pageListener = new IPageListener() {
            public void pageActivated(IWorkbenchPage page) {
                
            }
            public void pageClosed(IWorkbenchPage page) {
                
            }
            public void pageOpened(IWorkbenchPage page) {
                
                IAction buildHandler = new BuildAction(page.getWorkbenchWindow().getShell(), IncrementalProjectBuilder.INCREMENTAL_BUILD);
            	((RetargetActionWithDefault)buildProjectAction).setDefaultHandler(buildHandler);
            }
        };
        getWindow().addPageListener(pageListener);
        prefListener = new Preferences.IPropertyChangeListener() {
            public void propertyChange(Preferences.PropertyChangeEvent event) {
                if (event.getProperty().equals(
                        ResourcesPlugin.PREF_AUTO_BUILDING)) {
                   	updateBuildActions();
                }
            }