Debounce notebook outline updates during execution (microsoft#210004)

Author: DonJayamanne

src/vs/workbench/contrib/notebook/browser/viewModel/notebookOutlineProvider.ts

@@ -12,7 +12,7 @@ import { IMarkerService } from 'vs/platform/markers/common/markers';
 import { IThemeService } from 'vs/platform/theme/common/themeService';
 import { IActiveNotebookEditor, ICellViewModel, INotebookEditor, INotebookViewCellsUpdateEvent } from 'vs/workbench/contrib/notebook/browser/notebookBrowser';
 import { CellKind, NotebookSetting } from 'vs/workbench/contrib/notebook/common/notebookCommon';
-import { INotebookExecutionStateService, NotebookExecutionType } from 'vs/workbench/contrib/notebook/common/notebookExecutionStateService';
+import { INotebookExecutionStateService, NotebookExecutionType, type ICellExecutionStateChangedEvent, type IExecutionStateChangedEvent } from 'vs/workbench/contrib/notebook/common/notebookExecutionStateService';
 import { OutlineChangeEvent, OutlineConfigKeys, OutlineTarget } from 'vs/workbench/services/outline/browser/outline';
 import { OutlineEntry } from './OutlineEntry';
 import { IOutlineModelService } from 'vs/editor/contrib/documentSymbols/browser/outlineModel';
@@ -83,11 +83,16 @@ export class NotebookCellOutlineProvider {
 			this._onDidChange.fire({});
 		}));
 
-		this._disposables.add(notebookExecutionStateService.onDidChangeExecution(e => {
-			if (e.type === NotebookExecutionType.cell && !!this._editor.textModel && e.affectsNotebook(this._editor.textModel?.uri)) {
-				this._recomputeState();
-			}
-		}));
+		this._disposables.add(
+			Event.debounce<ICellExecutionStateChangedEvent | IExecutionStateChangedEvent>(
+				notebookExecutionStateService.onDidChangeExecution,
+				(last, _current) => last ?? _current,
+				200)(e => {
+					if (e.type === NotebookExecutionType.cell && !!this._editor.textModel && e.affectsNotebook(this._editor.textModel?.uri)) {
+						this._recomputeState();
+					}
+				})
+		);
 
 		this._recomputeState();
 	}