Remove finalizer and configuration

actionview/lib/action_view/railtie.rb

@@ -10,7 +10,6 @@ class Railtie < Rails::Engine # :nodoc:
     config.action_view.embed_authenticity_token_in_remote_forms = nil
     config.action_view.debug_missing_translation = true
     config.action_view.default_enforce_utf8 = nil
-    config.action_view.finalize_compiled_template_methods = true
 
     config.eager_load_namespaces << ActionView
 
@@ -46,13 +45,6 @@ class Railtie < Rails::Engine # :nodoc:
       end
     end
 
-    initializer "action_view.finalize_compiled_template_methods" do |app|
-      ActiveSupport.on_load(:action_view) do
-        ActionView::Template.finalize_compiled_template_methods =
-          app.config.action_view.delete(:finalize_compiled_template_methods)
-      end
-    end
-
     initializer "action_view.logger" do
       ActiveSupport.on_load(:action_view) { self.logger ||= Rails.logger }
     end

actionview/lib/action_view/template.rb

@@ -10,8 +10,6 @@ module ActionView
   class Template
     extend ActiveSupport::Autoload
 
-    mattr_accessor :finalize_compiled_template_methods, default: true
-
     # === Encodings in ActionView::Template
     #
     # ActionView::Template is one of a few sources of potential
@@ -118,16 +116,6 @@ class Template
 
     attr_reader :source, :identifier, :handler, :original_encoding, :updated_at
 
-    # This finalizer is needed (and exactly with a proc inside another proc)
-    # otherwise templates leak in development.
-    Finalizer = proc do |method_name, mod| # :nodoc:
-      proc do
-        mod.module_eval do
-          remove_possible_method method_name
-        end
-      end
-    end
-
     attr_reader :variable
 
     def initialize(source, identifier, handler, details)
@@ -337,9 +325,6 @@ def #{method_name}(local_assigns, output_buffer)
         end
 
         mod.module_eval(source, identifier, 0)
-        if finalize_compiled_template_methods
-          ObjectSpace.define_finalizer(self, Finalizer[method_name, mod])
-        end
       end
 
       def handle_render_error(view, e)

guides/source/configuring.md

@@ -590,13 +590,6 @@ Defaults to `'signed cookie'`.
 
 * `config.action_view.default_enforce_utf8` determines whether forms are generated with a hidden tag that forces older versions of Internet Explorer to submit forms encoded in UTF-8. This defaults to `false`.
 
-* `config.action_view.finalize_compiled_template_methods` determines
-  whether the methods on `ActionView::CompiledTemplates` that templates
-  compile themselves to are removed when template instances are
-  destroyed by the garbage collector. This helps prevent memory leaks in
-  development mode, but for large test suites, disabling this option in
-  the test environment can improve performance. This defaults to `true`.
-
 
 ### Configuring Action Mailbox
 

railties/lib/rails/generators/rails/app/templates/config/environments/test.rb.tt

@@ -48,7 +48,4 @@ Rails.application.configure do
 
   # Raises error for missing translations.
   # config.action_view.raise_on_missing_translations = true
-
-  # Prevent expensive template finalization at end of test suite runs.
-  config.action_view.finalize_compiled_template_methods = false
 end

railties/test/application/configuration_test.rb

@@ -2092,23 +2092,6 @@ class ::DummySerializer < ActiveJob::Serializers::ObjectSerializer; end
       assert_equal true, ActionView::Helpers::FormTagHelper.default_enforce_utf8
     end
 
-    test "ActionView::Template.finalize_compiled_template_methods is true by default" do
-      app "test"
-      assert_equal true, ActionView::Template.finalize_compiled_template_methods
-    end
-
-    test "ActionView::Template.finalize_compiled_template_methods can be configured via config.action_view.finalize_compiled_template_methods" do
-      app_file "config/environments/test.rb", <<-RUBY
-      Rails.application.configure do
-        config.action_view.finalize_compiled_template_methods = false
-      end
-      RUBY
-
-      app "test"
-
-      assert_equal false, ActionView::Template.finalize_compiled_template_methods
-    end
-
     test "ActiveJob::Base.return_false_on_aborted_enqueue is true by default" do
       app "development"