3 files changed, 31 insertions, 0 deletions
diff --git a/activerecord/lib/active_record.rb b/activerecord/lib/active_record.rb
index 196b87c0ac..2cfd528f2c 100644
--- a/activerecord/lib/active_record.rb
+++ b/activerecord/lib/active_record.rb
@@ -52,6 +52,7 @@ module ActiveRecord
     autoload :Batches
     autoload :Calculations
     autoload :Callbacks
+    autoload :ControllerRuntime
     autoload :DynamicFinderMatch
     autoload :DynamicScopeMatch
     autoload :Migration
diff --git a/activerecord/lib/active_record/controller_runtime.rb b/activerecord/lib/active_record/controller_runtime.rb
new file mode 100644
index 0000000000..1281901ae8
--- /dev/null
+++ b/activerecord/lib/active_record/controller_runtime.rb
@@ -0,0 +1,27 @@
+module ActiveRecord
+  module ControllerRuntime
+    extend ActiveSupport::Concern
+
+    attr_internal :db_runtime
+
+    def cleanup_view_runtime
+      if Object.const_defined?("ActiveRecord") && ActiveRecord::Base.connected?
+        db_rt_before_render = ActiveRecord::Base.connection.reset_runtime
+        runtime = super
+        db_rt_after_render = ActiveRecord::Base.connection.reset_runtime
+        self.db_runtime = db_rt_before_render + db_rt_after_render
+        runtime - db_rt_after_render
+      else
+        super
+      end
+    end
+
+    module ClassMethods
+      def process_log_action(controller)
+        super
+        db_runtime = controller.send :db_runtime
+        logger.info("  ActiveRecord runtime: %.1fms" % db_runtime.to_f) if db_runtime
+      end
+    end
+  end
+end
+\ No newline at end of file
diff --git a/activerecord/lib/active_record/rails.rb b/activerecord/lib/active_record/rails.rb
index e272d4eebc..8b22f869bc 100644
--- a/activerecord/lib/active_record/rails.rb
+++ b/activerecord/lib/active_record/rails.rb
@@ -7,6 +7,9 @@ require "action_controller/rails"
 module ActiveRecord
   class Plugin < Rails::Plugin
     plugin_name :active_record
+    include_modules_in "ActiveRecord::Base"
+
+    config.action_controller.include "ActiveRecord::ControllerRuntime"
 
     initializer "active_record.set_configs" do |app|
       app.config.active_record.each do |k,v|