notebook output performance

src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts

@@ -909,6 +909,9 @@ export class BackLayerWebView<T extends ICommonCellInfo> extends Themable {
 				}
 				case 'notebookPerformanceMessage': {
 					this.notebookEditor.updatePerformanceMetadata(data.cellId, data.executionId, data.duration, data.rendererId);
+					if (data.mimeType && data.outputSize && data.rendererId === 'vscode.builtin-renderer') {
+						this._sendPerformanceData(data.mimeType, data.outputSize, data.duration);
+					}
 					break;
 				}
 				case 'outputInputFocus': {
@@ -927,6 +930,30 @@ export class BackLayerWebView<T extends ICommonCellInfo> extends Themable {
 		return initializePromise.p;
 	}
 
+	private _sendPerformanceData(mimeType: string, outputSize: number, renderTime: number) {
+		type NotebookOutputRenderClassification = {
+			owner: 'amunger';
+			comment: 'Track performance data for output rendering';
+			mimeType: { classification: 'SystemMetaData'; purpose: 'FeatureInsight'; comment: 'Presentation type of the output.' };
+			outputSize: { classification: 'SystemMetaData'; purpose: 'FeatureInsight'; comment: 'Size of the output data buffer.'; isMeasurement: true };
+			renderTime: { classification: 'SystemMetaData'; purpose: 'FeatureInsight'; comment: 'Time spent rendering output.'; isMeasurement: true };
+		};
+
+		type NotebookOutputRenderEvent = {
+			mimeType: string;
+			outputSize: number;
+			renderTime: number;
+		};
+
+		const telemetryData = {
+			mimeType,
+			outputSize,
+			renderTime
+		};
+
+		this.telemetryService.publicLog2<NotebookOutputRenderEvent, NotebookOutputRenderClassification>('NotebookCellOutputRender', telemetryData);
+	}
+
 	private _handleNotebookCellResource(uri: URI) {
 		const notebookResource = uri.path.length > 0 ? uri : this.documentUri;
 

src/vs/workbench/contrib/notebook/browser/view/renderers/webviewMessages.ts

@@ -481,6 +481,8 @@ export interface IPerformanceMessage extends BaseToWebviewMessage {
 	readonly cellId: string;
 	readonly duration: number;
 	readonly rendererId: string;
+	readonly outputSize?: number;
+	readonly mimeType?: string;
 }
 
 

src/vs/workbench/contrib/notebook/browser/view/renderers/webviewPreloads.ts

@@ -2699,7 +2699,21 @@ async function webviewPreloads(ctx: PreloadContext) {
 			outputElement/** outputNode */.element.style.visibility = data.initiallyHidden ? 'hidden' : '';
 
 			if (!!data.executionId && !!data.rendererId) {
-				postNotebookMessage<webviewMessages.IPerformanceMessage>('notebookPerformanceMessage', { cellId: data.cellId, executionId: data.executionId, duration: Date.now() - startTime, rendererId: data.rendererId });
+				let outputSize: number | undefined = undefined;
+				let mimeType: string | undefined = undefined;
+				if (data.content.type === 1 /* extension */) {
+					outputSize = data.content.output.valueBytes.length;
+					mimeType = data.content.output.mime;
+				}
+
+				postNotebookMessage<webviewMessages.IPerformanceMessage>('notebookPerformanceMessage', {
+					cellId: data.cellId,
+					executionId: data.executionId,
+					duration: Date.now() - startTime,
+					rendererId: data.rendererId,
+					outputSize,
+					mimeType
+				});
 			}
 		}