Incremental Rendering

app/assets/javascripts/commons/vue.js

 import Vue from 'vue';
 import '../vue_shared/vue_resource_interceptor';
 
-// Vue.config.performance = true;
+Vue.config.performance = true;
 
 if (process.env.NODE_ENV !== 'production') {
   Vue.config.productionTip = false;

app/assets/javascripts/diffs/components/diff_line_gutter_content.vue

@@ -177,10 +177,10 @@ export default {
         title="Add a comment to this line"
         @click="handleCommentButton"
       >
-        <!--<icon
+        <icon
           :size="12"
           name="comment"
-        />-->
+        />
       </button>
       <a
         v-if="lineNumber"

app/assets/javascripts/diffs/store/modules/diff_state.js

@@ -8,6 +8,7 @@ const defaultViewType = INLINE_DIFF_VIEW_TYPE;
 
 export default () => ({
   isLoading: true,
+  loadingMessage: '',
   endpoint: '',
   basePath: '',
   commit: null,