Bug 76283 [performance] Problems requested twice when opening a Java editor
I20041013 When opening a Java editor, problems are requested once during ICompilationUnit#becomeWorkingCopy and once during ICompilationUnit#reconcile. The IProblemRequestor should be disabled during #becomeWorkingCopy so as to avoid to compute problems (which involves the full resolution of the working copy).
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
*/
	protected IAnnotationModel createAnnotationModel(IFile file) {
		return new CompilationUnitAnnotationModel(file);
	}
	
	/*
	 * @see org.eclipse.ui.editors.text.TextFileDocumentProvider#createFileInfo(java.lang.Object)
	 */
	protected FileInfo createFileInfo(Object element) throws CoreException {
		if (!(element instanceof IFileEditorInput))
			return null;
			
		IFileEditorInput input= (IFileEditorInput) element;
		ICompilationUnit original= createCompilationUnit(input.getFile());
		if (original == null)
			return null;
		
		FileInfo info= super.createFileInfo(element);
		if (!(info instanceof CompilationUnitInfo))
			return null;
			
		CompilationUnitInfo cuInfo= (CompilationUnitInfo) info;
		setUpSynchronization(cuInfo);
			
		IProblemRequestor requestor= cuInfo.fModel instanceof IProblemRequestor ? (IProblemRequestor) cuInfo.fModel : null;
		original.becomeWorkingCopy(requestor, getProgressMonitor());
		cuInfo.fCopy= original;
		
		if (cuInfo.fModel instanceof CompilationUnitAnnotationModel)   {
			CompilationUnitAnnotationModel model= (CompilationUnitAnnotationModel) cuInfo.fModel;