Move merging/unmerging of timelines into background. Move blocking into

background as well since it's a computationally expensive

app/lib/feed_manager.rb

@@ -50,6 +50,15 @@ class FeedManager
     trim(:home, into_account.id)
   end
 
+  def unmerge_from_timeline(from_account, into_account)
+    timeline_key = key(:home, into_account.id)
+
+    from_account.statuses.select('id').find_each do |status|
+      redis.zrem(timeline_key, status.id)
+      redis.zremrangebyscore(timeline_key, status.id, status.id)
+    end
+  end
+
   def inline_render(target_account, template, object)
     rabl_scope = Class.new do
       include RoutingHelper