README.md in jbuilder-2.0.0.beta2 vs README.md in jbuilder-2.0.0

@@ -195,13 +195,14 @@
 
 ``` ruby
 Jbuilder.key_format camelize: :lower
 ```
 
-Libraries similar to this in some form or another include:
+Faster JSON backends
+--------------------
 
-* Active Model Serializers: https://github.com/rails-api/active_model_serializers
-* RABL: https://github.com/nesquena/rabl
-* JsonBuilder: https://github.com/nov/jsonbuilder
-* JSON Builder: https://github.com/dewski/json_builder
-* Jsonify: https://github.com/bsiggelkow/jsonify
-* Representative View: https://github.com/mdub/representative_view
+Jbuilder uses MultiJson, which by default will use the JSON gem. That gem is currently tangled with ActiveSupport's all-Ruby #to_json implementation, which is slow (work is being done to correct this for a future version of Rails). For faster Jbuilder rendering, you can specify something like the Yajl JSON generator instead. You'll need to include the yajl-ruby gem in your Gemfile and then set the following configuration for MultiJson:
+
+``` ruby
+require 'multi_json'
+MultiJson.use :yajl
+ ```