Reload routes on each request in dev mode

Please provide a way to duplicate this bug.

Loading routes in all requests can hit performance hard, so it's a no go about this (note: I'm Devise core developer).

I hope this is an appropriate place to bring this up...

Since the routes are only reloaded when the mtime of the file has changed, any auto-loaded constants referenced in the routes file are not 'replaced' when their source file is reloaded after Dependencies.clear.

For instance:

match '/abc' => MyAutoloadedEndpoint

When Dependencies.clear has been run, and I have modified the source for MyAutoloadedEndpoint, things get weird. The constant is no longer defined, but the route set is still referencing that old code. If the call method of the endpoint then causes an auto load of another class, const_missing attempts to resolve it by utilizing a nesting process that will then auto load MyAutoloadedEndpoint!

Am I off my rocker? I have solved this for myself by adding, in an config/initializer/endpoints.rb, this bit of code:

if Rails.env == "development"
  lib_reloader = ActiveSupport::FileUpdateChecker.new(Dir["app/endpoints/**/*"], true) do
    Rails.application.reload_routes!
  end

  ActionDispatch::Callbacks.to_prepare do
    lib_reloader.execute_if_updated
  end
end

I'd love you're feedback, or pointers on where to talk about this. Thank you.