diff --git a/src/vs/workbench/api/node/extHostExtensionActivator.ts b/src/vs/workbench/api/node/extHostExtensionActivator.ts
index aa1108d2ef5bffa5256b0042027e69590e94a6a3..48475d388f8539c0545b69105d6c8afce57bcd3e 100644
--- a/src/vs/workbench/api/node/extHostExtensionActivator.ts
+++ b/src/vs/workbench/api/node/extHostExtensionActivator.ts
@@ -42,6 +42,14 @@ export interface IExtensionAPI {
 	// _extensionAPIBrand: any;
 }
 
+/* __GDPR__FRAGMENT__
+	"ExtensionActivationTimes" : {
+		"startup": { "classification": "SystemMetaData", "purpose": "PerformanceAndHealth", "isMeasurement": true },
+		"codeLoadingTime" : { "classification": "SystemMetaData", "purpose": "PerformanceAndHealth", "isMeasurement": true },
+		"activateCallTime" : { "classification": "SystemMetaData", "purpose": "PerformanceAndHealth", "isMeasurement": true },
+		"activateResolvedTime" : { "classification": "SystemMetaData", "purpose": "PerformanceAndHealth", "isMeasurement": true }
+	}
+*/
 export class ExtensionActivationTimes {
 
 	public static readonly NONE = new ExtensionActivationTimes(false, -1, -1, -1);
diff --git a/src/vs/workbench/api/node/extHostExtensionService.ts b/src/vs/workbench/api/node/extHostExtensionService.ts
index 7b74cca1e079643532b76218575dcfc96af39a0a..ad1a7e2246f123ab21a8dbebe2ab4f2d7b10f6e7 100644
--- a/src/vs/workbench/api/node/extHostExtensionService.ts
+++ b/src/vs/workbench/api/node/extHostExtensionService.ts
@@ -313,13 +313,33 @@ export class ExtHostExtensionService implements ExtHostExtensionServiceShape {
 			const activationTimes = activatedExtension.activationTimes;
 			let activationEvent = (reason instanceof ExtensionActivatedByEvent ? reason.activationEvent : null);
 			this._proxy.$onExtensionActivated(extensionDescription.id, activationTimes.startup, activationTimes.codeLoadingTime, activationTimes.activateCallTime, activationTimes.activateResolvedTime, activationEvent);
+			this._logExtensionActivationTimes(extensionDescription, reason, 'success', activationTimes);
 			return activatedExtension;
 		}, (err) => {
 			this._proxy.$onExtensionActivationFailed(extensionDescription.id);
+			this._logExtensionActivationTimes(extensionDescription, reason, 'failure');
 			throw err;
 		});
 	}
 
+	private _logExtensionActivationTimes(extensionDescription: IExtensionDescription, reason: ExtensionActivationReason, outcome: string, activationTimes?: ExtensionActivationTimes) {
+		let event = getTelemetryActivationEvent(extensionDescription, reason);
+		/* __GDPR__
+			"extensionActivationTimes" : {
+				"${include}": [
+					"${TelemetryActivationEvent}",
+					"${ExtensionActivationTimes}"
+				],
+				"outcome" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" }
+			}
+		*/
+		this._mainThreadTelemetry.$publicLog('extensionActivationTimes', {
+			...event,
+			...(activationTimes || {}),
+			outcome,
+		});
+	}
+
 	private _doActivateExtension(extensionDescription: IExtensionDescription, reason: ExtensionActivationReason): Promise<ActivatedExtension> {
 		let event = getTelemetryActivationEvent(extensionDescription, reason);
 		/* __GDPR__