activity page cache

app/controllers/projects_controller.rb

@@ -11,6 +11,9 @@ class ProjectsController < ApplicationController
   before_filter :require_non_empty_project, :only => [:blob, :tree]
   before_filter :load_refs, :only => :tree # load @branch, @tag & @ref
+  # expire show page every 4 minute
+  caches_action :show, :expires_in => 4.minutes
+
   def index
     source = current_user.projects
     source = source.tagged_with(params[:tag]) unless params[:tag].blank?