From b4dfb84f37ace5446353164477f6f7a542dc83e6 Mon Sep 17 00:00:00 2001
From: Sam <sam.saffron@gmail.com>
Date: Wed, 17 Aug 2016 10:04:23 +1000
Subject: [PATCH] PERF: stop doing work for HEAD requests on topics

---
 app/controllers/topics_controller.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/controllers/topics_controller.rb b/app/controllers/topics_controller.rb
index 90f883f9646..acae3c2af9b 100644
--- a/app/controllers/topics_controller.rb
+++ b/app/controllers/topics_controller.rb
@@ -620,6 +620,12 @@ class TopicsController < ApplicationController
   end
 
   def perform_show_response
+
+    if request.head?
+      head :ok
+      return
+    end
+
     topic_view_serializer = TopicViewSerializer.new(@topic_view, scope: guardian, root: false, include_raw: !!params[:include_raw])
 
     respond_to do |format|