debt - add switch to append the ellased-time to a file and then shutdown

src/vs/platform/environment/common/environment.ts

@@ -25,6 +25,7 @@ export interface ParsedArgs {
 	performance?: boolean;
 	'prof-startup'?: string;
 	'prof-startup-prefix'?: string;
+	'prof-append-timers'?: string;
 	verbose?: boolean;
 	log?: string;
 	logExtensionHostCommunication?: boolean;

src/vs/workbench/parts/performance/electron-browser/performance.contribution.ts

@@ -7,4 +7,5 @@
 
 import './startupProfiler';
 import './startupTimings';
+import './startupTimingsAppender';
 import './stats';

src/vs/workbench/parts/performance/electron-browser/startupTimingsAppender.ts

@@ -0,0 +1,49 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import { IExtensionService } from 'vs/workbench/services/extensions/common/extensions';
+import { ILifecycleService, LifecyclePhase } from 'vs/platform/lifecycle/common/lifecycle';
+import { IWindowsService } from 'vs/platform/windows/common/windows';
+import { IWorkbenchContributionsRegistry, IWorkbenchContribution, Extensions } from 'vs/workbench/common/contributions';
+import { Registry } from 'vs/platform/registry/common/platform';
+import { ITimerService } from 'vs/workbench/services/timer/common/timerService';
+import { IEnvironmentService } from 'vs/platform/environment/common/environment';
+import { nfcall } from 'vs/base/common/async';
+import { appendFile } from 'fs';
+
+class StartupTimingsAppender implements IWorkbenchContribution {
+
+	constructor(
+		@ITimerService timerService: ITimerService,
+		@IWindowsService windowsService: IWindowsService,
+		@ILifecycleService lifecycleService: ILifecycleService,
+		@IExtensionService extensionService: IExtensionService,
+		@IEnvironmentService environmentService: IEnvironmentService,
+	) {
+
+		let appendTo = environmentService.args['prof-append-timers'];
+		if (!appendTo) {
+			return;
+		}
+
+		Promise.all([
+			lifecycleService.when(LifecyclePhase.Eventually),
+			extensionService.whenInstalledExtensionsRegistered()
+		]).then(() => {
+			const { startupMetrics } = timerService;
+			return nfcall(appendFile, appendTo, `${Date.now()}\t${startupMetrics.ellapsed}\n`);
+		}).then(() => {
+			windowsService.quit();
+		}).catch(err => {
+			console.error(err);
+			windowsService.quit();
+		});
+	}
+}
+
+const registry = Registry.as<IWorkbenchContributionsRegistry>(Extensions.Workbench);
+registry.registerWorkbenchContribution(StartupTimingsAppender, LifecyclePhase.Running);