3 files changed, 23 insertions, 1 deletions
diff --git a/actionview/CHANGELOG.md b/actionview/CHANGELOG.md
index 393de562a2..918ae48bed 100644
--- a/actionview/CHANGELOG.md
+++ b/actionview/CHANGELOG.md
@@ -1,3 +1,12 @@
+*   Disable `ActionView::Template` finalizers in test environment
+
+    Template finalization can be expensive in large view test suites.
+    Add a configuration option,
+    `action_view.finalize_compiled_template_methods`, and turn it off in
+    the test environment.
+
+    *Simon Coffey*
+
 *   Extract the `confirm` call in its own, overridable method in `rails_ujs`.
     Example :
         Rails.confirm = function(message, element) {
diff --git a/actionview/lib/action_view/railtie.rb b/actionview/lib/action_view/railtie.rb
index 12bdc642d4..12d06bf376 100644
--- a/actionview/lib/action_view/railtie.rb
+++ b/actionview/lib/action_view/railtie.rb
@@ -10,6 +10,7 @@ module ActionView
     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
 
@@ -45,6 +46,13 @@ module ActionView
       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
diff --git a/actionview/lib/action_view/template.rb b/actionview/lib/action_view/template.rb
index 0c4bb73acb..1c8713d6e3 100644
--- a/actionview/lib/action_view/template.rb
+++ b/actionview/lib/action_view/template.rb
@@ -9,6 +9,9 @@ module ActionView
   class Template
     extend ActiveSupport::Autoload
 
+    mattr_accessor :finalize_compiled_template_methods
+    self.finalize_compiled_template_methods = true
+
     # === Encodings in ActionView::Template
     #
     # ActionView::Template is one of a few sources of potential
@@ -307,7 +310,9 @@ module ActionView
         end
 
         mod.module_eval(source, identifier, 0)
-        ObjectSpace.define_finalizer(self, Finalizer[method_name, mod])
+        if finalize_compiled_template_methods
+          ObjectSpace.define_finalizer(self, Finalizer[method_name, mod])
+        end
       end
 
       def handle_render_error(view, e)