Bug 77320 Junit performance [JUnit]
We have 2315 unit tests. When run from Eclipse, it's reporting to take ~122 seconds. When run from ant, it reports taking ~25 seconds. The majority of this time is spent with the JUnit view showing "Launching...". This has gotten worse and worse as we add more UTs. I expect Eclipse to be slower than Ant, but not by this much.
org.eclipse.jdt.junit/src/org/eclipse/jdt/internal/junit/ui/TestRunnerViewPart.java
aboutToStart();
		fTestInfos.clear();
		fFailures= new ArrayList();
	}
	private void clearStatus() {
		getStatusLine().setMessage(null);
		getStatusLine().setErrorMessage(null);
	}
    public void setFocus() {
    	if (fActiveRunTab != null)
    		fActiveRunTab.setFocus();
    }
    public void createPartControl(Composite parent) {	
    	fParent= parent;
    	addResizeListener(parent);
		fClipboard= new Clipboard(parent.getDisplay());
		GridLayout gridLayout= new GridLayout(); 
		gridLayout.marginWidth= 0;
		gridLayout.marginHeight= 0;
		parent.setLayout(gridLayout);
		configureToolBar();
		
		fCounterComposite= createProgressCountPanel(parent);
		fCounterComposite.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
		SashForm sashForm= createSashForm(parent);
		sashForm.setLayoutData(new GridData(GridData.FILL_BOTH));
		IActionBars actionBars= getViewSite().getActionBars();
		actionBars.setGlobalActionHandler(
			ActionFactory.COPY.getId(),
			new CopyTraceAction(fFailureTrace, fClipboard));