Bug 43766 [reconciling] ResourceMarkerAnnotationModel listener taking a long time
Build: I20030925 I was investigating a situation where adding breakpoints to a large file was very slow. It can take up to a second to add a breakpoint to a file such as Workspace.java (2000 lines). Almost all of this time is in the resource change listener added by ResourceMarkerAnnotationModel. First, a minor issue: Instead of adding a resource change listener that traverses the entire delta, you can locate a given resource delta within the resource change delta very quickly using IResourceDelta.findMember(): public void resourceChanged(IResourceChangeEvent e) { IResourceDelta delta= e.getDelta(); if (delta != null) { IResourceDelta child = delta.findMember(fResource.getFullPath()); if (child != null) update(child.getMarkerDeltas()); } } However, this was only a small speed improvement. The main problem is that the entire compilation unit is reparsed every time a breakpoint is added. I have added a profiler trace of where the time is going for adding a single breakpoint.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/filebuffers/CompilationUnitDocumentProvider2.java
}
	
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.ICompilationUnitDocumentProvider#setSavePolicy(org.eclipse.jdt.internal.ui.javaeditor.ISavePolicy)
	 */
	public void setSavePolicy(ISavePolicy savePolicy) {
		fSavePolicy= savePolicy;
	}
	
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.ICompilationUnitDocumentProvider#addGlobalAnnotationModelListener(org.eclipse.jface.text.source.IAnnotationModelListener)
	 */
	public void addGlobalAnnotationModelListener(IAnnotationModelListener listener) {
		fGlobalAnnotationModelListener.addListener(listener);
	}
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.ICompilationUnitDocumentProvider#removeGlobalAnnotationModelListener(org.eclipse.jface.text.source.IAnnotationModelListener)
	 */
	public void removeGlobalAnnotationModelListener(IAnnotationModelListener listener) {
		fGlobalAnnotationModelListener.removeListener(listener);
	}
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.ICompilationUnitDocumentProvider#getWorkingCopy(java.lang.Object)
	 */
	public ICompilationUnit getWorkingCopy(Object element) {
		FileInfo fileInfo= getFileInfo(element);		
		if (fileInfo instanceof CompilationUnitInfo) {
			CompilationUnitInfo info= (CompilationUnitInfo) fileInfo;
			return info.fCopy;
		}