From f930aa14ec1aa705ac1bd0f479256ac4729a42ba Mon Sep 17 00:00:00 2001
From: Neil Lalonde <neillalonde@gmail.com>
Date: Mon, 16 May 2016 14:26:14 -0400
Subject: [PATCH] FIX: too much memory used by long topics

---
 .../discourse/components/google-dfp-ad.js.es6     | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/assets/javascripts/discourse/components/google-dfp-ad.js.es6 b/assets/javascripts/discourse/components/google-dfp-ad.js.es6
index c746f10..d90ca0b 100755
--- a/assets/javascripts/discourse/components/google-dfp-ad.js.es6
+++ b/assets/javascripts/discourse/components/google-dfp-ad.js.es6
@@ -116,6 +116,15 @@ function defineSlot(divId, placement, settings, isMobile) {
   }
 }
 
+function destroySlot(divId) {
+  if (ads[divId] && window.googletag) {
+    window.googletag.cmd.push(function(){
+      window.googletag.destroySlots([ads[divId].ad]);
+      delete ads[divId];
+    });
+  }
+}
+
 function loadGoogle() {
   if (_loaded) {
     return Ember.RSVP.resolve();
@@ -208,5 +217,9 @@ export default Ember.Component.extend({
         }
       });
     });
-  }.on('didInsertElement')
+  }.on('didInsertElement'),
+
+  cleanup: function() {
+    destroySlot(this.get('divId'));
+  }.on('willDestroyElement')
 });