Mark bang instrumentations as something that you shuold not be listening to.

actionpack/lib/action_controller/test_case.rb

@@ -13,7 +13,7 @@ module ActionController
     def setup_subscriptions
       @partials = Hash.new(0)
       @templates = Hash.new(0)
-      ActiveSupport::Notifications.subscribe("action_view.slow_render_template") do |name, start, finish, id, payload|
+      ActiveSupport::Notifications.subscribe("action_view.render_template!") do |name, start, finish, id, payload|
         path = payload[:virtual_path]
         next unless path
         partial = path =~ /^.*\/_[^\/]*$/
@@ -28,7 +28,7 @@ module ActionController
     end
 
     def teardown_subscriptions
-      ActiveSupport::Notifications.unsubscribe("action_view.slow_render_template")
+      ActiveSupport::Notifications.unsubscribe("action_view.render_template!")
     end
 
     # Asserts that the request was rendered with the appropriate template file or partials

actionpack/lib/action_view/template.rb

@@ -23,7 +23,6 @@ module ActionView
       @identifier = identifier
       @handler    = handler
 
-      @partial      = details[:partial]
       @virtual_path = details[:virtual_path]
       @method_names = {}
 
@@ -36,9 +35,9 @@ module ActionView
     end
 
     def render(view, locals, &block)
-      # TODO: Revisit this name
-      # This is only slow if it's being listened to. Do not instrument this in production.
-      ActiveSupport::Notifications.instrument("action_view.slow_render_template", :virtual_path => @virtual_path) do
+      # Notice that we use a bang in this instrumentation because you don't want to
+      # consume this in production. This is only slow if it's being listened to.
+      ActiveSupport::Notifications.instrument("action_view.render_template!", :virtual_path => @virtual_path) do
         method_name = compile(locals, view)
         view.send(method_name, locals, &block)
       end
@@ -63,10 +62,6 @@ module ActionView
       @counter_name ||= "#{variable_name}_counter".to_sym
     end
 
-    def partial?
-      @partial
-    end
-
     def inspect
       if defined?(Rails.root)
         identifier.sub("#{Rails.root}/", '')

activesupport/lib/active_support/notifications/fanout.rb

@@ -44,7 +44,7 @@ module ActiveSupport
             when Regexp, NilClass
               pattern
             else
-              /^#{Regexp.escape(pattern.to_s)}/
+              /^#{Regexp.escape(pattern.to_s)}$/
             end
         end
 

activesupport/test/notifications_test.rb

@@ -65,7 +65,7 @@ module Notifications
       assert_equal [[:foo]] * 4, @events
     end
 
-    def test_log_subscriber_with_pattern
+    def test_log_subscriber_with_string
       events = []
       @notifier.subscribe('1') { |*args| events << args }
 
@@ -74,10 +74,10 @@ module Notifications
       @notifier.publish 'a.1'
       @notifier.wait
 
-      assert_equal [['1'], ['1.a']], events
+      assert_equal [['1']], events
     end
 
-    def test_log_subscriber_with_pattern_as_regexp
+    def test_log_subscriber_with_pattern
       events = []
       @notifier.subscribe(/\d/) { |*args| events << args }