Hopefully cut down the stream rendering time by memoizing the new comment form

app/helpers/stream_helper.rb

@@ -3,7 +3,7 @@
 #   the COPYRIGHT file.
 
 module StreamHelper
-
+  GSUB_THIS = "FIUSDHVIUSHDVIUBAIUHAPOIUXJM"
   def comment_toggle(count)
     if count == 0
       link_to "#{t('comments.new_comment.comment').downcase}", '#', :class => "show_post_comments"
@@ -14,4 +14,9 @@ module StreamHelper
     end
   end
 
+  def new_comment_form(post_id)
+    @form ||= controller.render_to_string(
+      :partial => 'comments/new_comment', :locals => {:post_id => GSUB_THIS})
+    @form.gsub(GSUB_THIS, post_id.to_s)
+  end
 end

app/views/comments/_comments.html.haml

@@ -10,5 +10,5 @@
   -else
     = render :partial => 'comments/comment', :collection => comment_hashes, :as => :hash
   %li.comment.show
-    = render 'comments/new_comment', :post_id => post_id
+    = new_comment_form(post_id)
 

spec/controllers/aspects_controller_spec.rb

@@ -53,7 +53,7 @@ describe AspectsController do
       it 'takes time' do
         Benchmark.realtime{
           get :index
-        }.should < 3
+        }.should < 2
       end
     end
   end

spec/helpers/stream_helper_spec.rb

@@ -0,0 +1,20 @@
+require 'spec_helper'
+
+describe StreamHelper do
+  before do
+    @user = make_user
+    @aspect = @user.aspects.create(:name => 'aspect')
+    @post = @user.post(:status_message, :message => "hi", :to => @aspect.id)
+  end
+  it 'renders a new comment form' do
+    new_comment_form(@post.id).should == 
+      @controller.render_to_string(:partial => 'comments/new_comment', :locals => {:post_id => @post.id})
+  end
+  it 'renders it fast the second time' do
+    new_comment_form(@post.id)
+    time = Benchmark.realtime{
+      new_comment_form(@post.id)
+    }
+    (time*1000).should < 1
+  end
+end