Trace for notebook editor markup warmup (#161516)

src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts

@@ -85,6 +85,7 @@ import { EditorExtensionsRegistry } from 'vs/editor/browser/editorExtensions';
 import { IEditorGroupsService } from 'vs/workbench/services/editor/common/editorGroupsService';
 import { NotebookPerfMarks } from 'vs/workbench/contrib/notebook/common/notebookPerformance';
 import { BaseCellEditorOptions } from 'vs/workbench/contrib/notebook/browser/viewModel/cellEditorOptions';
+import { ILogService } from 'vs/platform/log/common/log';
 
 const $ = DOM.$;
 
@@ -255,6 +256,7 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditorD
 		@INotebookExecutionService private readonly notebookExecutionService: INotebookExecutionService,
 		@INotebookExecutionStateService notebookExecutionStateService: INotebookExecutionStateService,
 		@IEditorProgressService private readonly editorProgressService: IEditorProgressService,
+		@ILogService private readonly logService: ILogService
 	) {
 		super();
 		this.isEmbedded = creationOptions.isEmbedded ?? false;
@@ -1481,12 +1483,15 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditorD
 
 	private async _warmupWithMarkdownRenderer(viewModel: NotebookViewModel, viewState: INotebookEditorViewState | undefined) {
 
+		this.logService.trace('NotebookEditorWidget.warmup', this.viewModel?.uri.toString());
 		await this._resolveWebview();
+		this.logService.trace('NotebookEditorWidget.warmup - webview resolved');
 
 		// make sure that the webview is not visible otherwise users will see pre-rendered markdown cells in wrong position as the list view doesn't have a correct `top` offset yet
 		this._webview!.element.style.visibility = 'hidden';
 		// warm up can take around 200ms to load markdown libraries, etc.
 		await this._warmupViewport(viewModel, viewState);
+		this.logService.trace('NotebookEditorWidget.warmup - viewport warmed up');
 
 		// todo@rebornix @mjbvz, is this too complicated?
 
@@ -1505,7 +1510,7 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditorD
 		this._list.scrollTop = viewState?.scrollPosition?.top ?? 0;
 		this._debug('finish initial viewport warmup and view state restore.');
 		this._webview!.element.style.visibility = 'visible';
-
+		this.logService.trace('NotebookEditorWidget.warmup - list view model attached, set to visible');
 	}
 
 	private async _warmupViewport(viewModel: NotebookViewModel, viewState: INotebookEditorViewState | undefined) {