fix #1057

Author: krausest

frameworks/keyed/ember/app/components/my-table.js

@@ -36,7 +36,9 @@ export default class MyTable extends Component {
   }
 
   @action add() {
-    this.data = add(this.id, this.data)
+    const result = add(this.id, this.data);
+    this.id = result.id;
+    this.data = result.data;
   }
 
   @action update() {

frameworks/keyed/ember/app/utils/benchmark-helpers.js

@@ -53,7 +53,7 @@ export const buildData = (id, count = 1000) => {
 
 export const add = (id, data) => {
     const newData = buildData(id, 1000);
-    return [ ...data, ...newData.data];
+    return {data: [ ...data, ...newData.data], id: newData.id};
 }
 
 export const run = (id) => {