README.md in spree-0.70.0 vs README.md in spree-0.70.1

@@ -42,9 +42,17 @@
 
 If you also want some sample products, orders, etc. to play with you can run the appropriate rake task.
 
     $ bundle exec rake spree_sample:load
 
+Peformance
+----------
+
+Rails 3.1 introduced a concept known as the asset pipeline.  Unfortunately it results in poor performance when running your site in development mode (production mode is unaffected.)  You may want to run the following command when testing locally in development mode
+
+    $ bundle exec rake assets:precompile:nondigest
+
+Using the precompile rake task in development will prevent any changes to asset files from being automatically included in when you reload the page. You must re-run the precompile task for changes to become available.
 
 Browse Store
 ------------
 
 http://localhost:nnnn