diff --git a/Gemfile b/Gemfile
index 9ccb7dbdd03..fe6d897ee18 100644
--- a/Gemfile
+++ b/Gemfile
@@ -118,6 +118,9 @@ gem "sprockets", :git => "git://github.com/SamSaffron/sprockets.git", :branch =>
 # ActiveRecord, this may change in the future
 gem 'fast_blank' #, github: "SamSaffron/fast_blank"
 
+# this provides a very efficient lru cache
+gem 'lru_redux'
+
 # IMPORTANT: mini profiler monkey patches, so it better be required last
 #  If you want to amend mini profiler to do the monkey patches in the railstie
 #  we are open to it. by deferring require to the initializer we can configure disourse installs without it
diff --git a/Gemfile.lock b/Gemfile.lock
index 75ad4513f8d..b75d4b98d65 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -251,6 +251,7 @@ GEM
       thor (~> 0.15)
     libv8 (3.11.8.17)
     listen (0.7.2)
+    lru_redux (0.0.6)
     lumberjack (1.0.2)
     mail (2.4.4)
       i18n (>= 0.4.0)
@@ -511,6 +512,7 @@ DEPENDENCIES
   jquery-rails
   jshint_on_rails
   librarian (>= 0.0.25)
+  lru_redux
   message_bus!
   minitest
   mocha