PERF: missing index on useractions making user page slow

db/migrate/20150514043155_add_user_actions_all_index.rb

@@ -0,0 +1,5 @@
+class AddUserActionsAllIndex < ActiveRecord::Migration
+  def change
+    add_index :user_actions, [:user_id, :created_at, :action_type], name: 'idx_user_actions_speed_up_user_all'
+  end
+end