Question

While migrating a rails 2 app to rails 3 I encountered a huge increase in memory used.
After some research I found out the helpers were the problem. Uncommenting any helpers in the view would speed everything up.

Things I tried to find the real issue:

• include_all_helpers = false
• disable parts of the helper files
• clean up the code by refactoring Model.all usages to some faster code

I got a theory now that some helpers might be renamed or deleted, rails starts to search for them and starts searching models / controllers as rescue.

A page request takes up to 5 seconds and using 2 GB of memory.

Anyone got a clue what causes this issue and how to fix or debug it?

Answer 1

Fixed by placing this in config/initializers/anti_freeze_hack.rb :

module ActionDispatch
  module Routing
    class RouteSet
      alias inspect to_s
    end
  end
end

Credits to Amala for linking me the right topic 😀