diff --git a/src/main.js b/src/main.js
index 3192f1f086c..6e29b5203a6 100644
--- a/src/main.js
+++ b/src/main.js
@@ -219,7 +219,6 @@ var nodeCachedDataDir = getNodeCachedDataDir().then(function (value) {
 // Load our code once ready
 app.once('ready', function () {
 	perf.mark('main:appReady');
-	global.perfAppReady = Date.now();
 	var nlsConfig = getNLSConfiguration();
 	process.env['VSCODE_NLS_CONFIG'] = JSON.stringify(nlsConfig);
 
diff --git a/src/vs/code/electron-main/window.ts b/src/vs/code/electron-main/window.ts
index bdf16efb1f5..4c37dd6e993 100644
--- a/src/vs/code/electron-main/window.ts
+++ b/src/vs/code/electron-main/window.ts
@@ -587,7 +587,6 @@ export class CodeWindow implements ICodeWindow {
 		// Perf Counters
 		windowConfiguration.perfEntries = exportEntries();
 		windowConfiguration.perfStartTime = global.perfStartTime;
-		windowConfiguration.perfAppReady = global.perfAppReady;
 		windowConfiguration.perfWindowLoadTime = Date.now();
 
 		// Config (combination of process.argv and window configuration)
diff --git a/src/vs/workbench/electron-browser/bootstrap/index.js b/src/vs/workbench/electron-browser/bootstrap/index.js
index 9357afcaeab..867ed81842e 100644
--- a/src/vs/workbench/electron-browser/bootstrap/index.js
+++ b/src/vs/workbench/electron-browser/bootstrap/index.js
@@ -175,7 +175,6 @@ function main() {
 		isInitialStartup: !!configuration.isInitialStartup,
 		hasAccessibilitySupport: !!configuration.accessibilitySupport,
 		start: configuration.perfStartTime,
-		appReady: configuration.perfAppReady,
 		windowLoad: configuration.perfWindowLoadTime
 	};
 
diff --git a/src/vs/workbench/services/timer/common/timerService.ts b/src/vs/workbench/services/timer/common/timerService.ts
index 5b06fc4cdef..f6ca71866cb 100644
--- a/src/vs/workbench/services/timer/common/timerService.ts
+++ b/src/vs/workbench/services/timer/common/timerService.ts
@@ -83,11 +83,7 @@ export interface IStartupMetrics {
 
 export interface IInitData {
 	start: number;
-
-	appReady: number;
-
 	windowLoad: number;
-
 	isInitialStartup: boolean;
 	hasAccessibilitySupport: boolean;
 }
diff --git a/src/vs/workbench/services/timer/node/timerService.ts b/src/vs/workbench/services/timer/node/timerService.ts
index 972dae9b351..7a49b00ba65 100644
--- a/src/vs/workbench/services/timer/node/timerService.ts
+++ b/src/vs/workbench/services/timer/node/timerService.ts
@@ -14,7 +14,6 @@ export class TimerService implements ITimerService {
 	public _serviceBrand: any;
 
 	public readonly start: number;
-	public readonly appReady: number;
 	public readonly windowLoad: number;
 
 	public readonly isInitialStartup: boolean;
@@ -24,7 +23,6 @@ export class TimerService implements ITimerService {
 
 	constructor(initData: IInitData, private isEmptyWorkbench: boolean) {
 		this.start = initData.start;
-		this.appReady = initData.appReady;
 		this.windowLoad = initData.windowLoad;
 
 		this.isInitialStartup = initData.isInitialStartup;
@@ -100,8 +98,8 @@ export class TimerService implements ITimerService {
 		};
 
 		if (initialStartup) {
-			this._startupMetrics.timers.ellapsedAppReady = this.appReady - this.start;
-			this._startupMetrics.timers.ellapsedWindowLoad = this.windowLoad - this.appReady;
+			this._startupMetrics.timers.ellapsedAppReady = perf.getDuration('main:started', 'main:appReady');
+			this._startupMetrics.timers.ellapsedWindowLoad = this.windowLoad - perf.getEntry('mark', 'main:appReady').startTime;
 		}
 	}
 }