Merge pull request rails#49029 from technicalpickles/abstractcontroller_base-action_methods-performance

Improve performance of AbstractController::Base#action_methods

Author: rafaelfranca

actionpack/lib/abstract_controller/base.rb

@@ -91,14 +91,11 @@ def internal_methods
       def action_methods
         @action_methods ||= begin
           # All public instance methods of this class, including ancestors
-          methods = (public_instance_methods(true) -
-            # Except for public instance methods of Base and its ancestors
-            internal_methods +
-            # Be sure to include shadowed public instance methods of this class
-            public_instance_methods(false))
-
+          # except for public instance methods of Base and its ancestors.
+          methods = public_instance_methods(true) - internal_methods
+          # Be sure to include shadowed public instance methods of this class.
+          methods.concat(public_instance_methods(false))
           methods.map!(&:to_s)
-
           methods.to_set
         end
       end