avoid timeout

lib/feed_model/cache.rb

@@ -21,12 +21,16 @@ module FeedModel
     end
     def do_before_save
       if self.class == Category
+        Thread.new do
           SiteFeedAnnc.where(merge_with_category: self.id.to_s).each do |site_feed_annc|
             recreate_annc_cache(site_feed_annc)
           end
+        end
       elsif self.class == SiteFeed
         if self.disabled != true
+          Thread.new do
             recreate_annc_cache(self)
+          end
         else
           tmp = SiteFeedAnnc.where(feed_id: self.id).first
           if !tmp.nil?