improve process time of octopress/jekyll

jekyll-patch.rb

# based lib/jekyll/site.rb of jekyll 0.11.0
module Jekyll
  class Site
    class PostList < Array
      def index(obj)
        unless @hash
          @hash = {}
          each_with_index do |post, idx|
            @hash[post.object_id] = idx
          end
          freeze
        end
        @hash[obj.object_id]
      end
    end

    alias orig_reset reset
    def reset
      orig_reset
      self.posts = PostList.new
    end
  end
end