From 959ce65323b399e52cbb93932c63b95474d88caf Mon Sep 17 00:00:00 2001
From: "Manu Mtz.-Almeida" <manu.mtza@gmail.com>
Date: Mon, 3 Dec 2018 19:48:12 +0100
Subject: [PATCH] perf(angular): detach hidden pages from change detection

---
 angular/src/directives/navigation/stack-controller.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/angular/src/directives/navigation/stack-controller.ts b/angular/src/directives/navigation/stack-controller.ts
index fd75849049..3f48e1763e 100644
--- a/angular/src/directives/navigation/stack-controller.ts
+++ b/angular/src/directives/navigation/stack-controller.ts
@@ -106,9 +106,8 @@ export class StackController {
       const element = view.element;
       element.setAttribute('aria-hidden', 'true');
       element.classList.add('ion-page-hidden');
-      // view.ref.changeDetectorRef.detach();
+      view.ref.changeDetectorRef.detach();
     }
-
     this.viewsSnapshot = views.slice();
   }
 
@@ -133,6 +132,9 @@ export class StackController {
       this.skipTransition = false;
       return;
     }
+    if (enteringView) {
+      enteringView.ref.changeDetectorRef.reattach();
+    }
     const enteringEl = enteringView ? enteringView.element : undefined;
     const leavingEl = leavingView ? leavingView.element : undefined;
     const containerEl = this.containerEl;