1 files changed, 16 insertions, 2 deletions
diff --git a/actionview/lib/action_view/log_subscriber.rb b/actionview/lib/action_view/log_subscriber.rb
index fd9a543e0a..6c8d9cb5bf 100644
--- a/actionview/lib/action_view/log_subscriber.rb
+++ b/actionview/lib/action_view/log_subscriber.rb
@@ -1,9 +1,16 @@
+require 'active_support/log_subscriber'
+
 module ActionView
   # = Action View Log Subscriber
   #
   # Provides functionality so that Rails can output logs from Action View.
   class LogSubscriber < ActiveSupport::LogSubscriber
-    VIEWS_PATTERN = /^app\/views\//.freeze
+    VIEWS_PATTERN = /^app\/views\//
+
+    def initialize
+      @root = nil
+      super
+    end
 
     def render_template(event)
       return unless logger.info?
@@ -21,8 +28,15 @@ module ActionView
 
   protected
 
+    EMPTY = ''
     def from_rails_root(string)
-      string.sub("#{Rails.root}/", "").sub(VIEWS_PATTERN, "")
+      string = string.sub(rails_root, EMPTY)
+      string.sub!(VIEWS_PATTERN, EMPTY)
+      string
+    end
+
+    def rails_root
+      @root ||= "#{Rails.root}/"
     end
   end
 end