Reuse post-analyzer and cooked-document when requesting multiple post stats

app/models/post.rb

@@ -83,17 +83,18 @@ class Post < ActiveRecord::Base
   end
 
   def post_analyzer
-    @post_analyzer = PostAnalyzer.new(raw, topic_id)
+    @post_analyzers ||= {}
+    @post_analyzers[raw_hash] ||= PostAnalyzer.new(raw, topic_id)
   end
 
   %w{raw_mentions linked_hosts image_count attachment_count link_count raw_links}.each do |attr|
     define_method(attr) do
-      PostAnalyzer.new(raw, topic_id).send(attr)
+      post_analyzer.send(attr)
     end
   end
 
   def cook(*args)
-    PostAnalyzer.new(raw, topic_id).cook(*args)
+    post_analyzer.cook(*args)
   end
 
 

app/models/post_analyzer.rb

@@ -1,17 +1,10 @@
 class PostAnalyzer
 
-  attr_accessor :cooked, :raw
-
   def initialize(raw, topic_id)
     @raw  = raw
     @topic_id = topic_id
   end
 
-  def cooked_document
-    @cooked = cook(@raw, topic_id: @topic_id)
-    @cooked_document = Nokogiri::HTML.fragment(@cooked)
-  end
-
   # What we use to cook posts
   def cook(*args)
     cooked = PrettyText.cook(*args)
@@ -110,6 +103,10 @@ class PostAnalyzer
 
   private
 
+  def cooked_document
+    @cooked_document ||= Nokogiri::HTML.fragment(cook(@raw, topic_id: @topic_id))
+  end
+
   def link_is_a_mention?(l)
     html_class = l.attributes['class']
     return false if html_class.nil?