try a speed hack using a Link: header for the stylesheet

probably only works in firefox though

app/controllers/application_controller.rb

@@ -1,8 +1,11 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
   before_filter :authenticate_user
+  before_filter :send_css_link_header
   before_filter :increase_traffic_counter
 
+  @@_css_link_header = nil
+
   TRAFFIC_DECREMENTER = 0.25
 
   TAG_FILTER_COOKIE = :tag_filters
@@ -18,6 +21,27 @@ class ApplicationController < ActionController::Base
     true
   end
 
+  # speed hax
+  @@_css_link_header = nil
+  def send_css_link_header
+    begin
+      if !@@_css_link_header
+        # is there a better way to find this?
+        j = JSON.parse(File.read(Dir.glob(
+          "#{Rails.root}/public/assets/manifest-*.json").first))
+
+        @@_css_link_header = "</assets/" << j["assets"]["application.css"] <<
+          ">; rel=stylesheet"
+      end
+    rescue => e
+      Rails.logger.error e.inspect
+    end
+
+    if @@_css_link_header
+      response.headers["Link"] = @@_css_link_header
+    end
+  end
+
   def increase_traffic_counter
     @traffic = 1.0