Enable caching

config/environments/production.rb

@@ -13,6 +13,7 @@ Rails.application.configure do
   # Full error reports are disabled and caching is turned on.
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true
+  config.perform_caching = true
   config.cache_store = :memory_store
 
   # Enable Rack::Cache to put a simple HTTP cache in front of your application