User blog comment:Rappy 4187/Technical Update: March 10, 2015/@comment-4714517-20150311212001/@comment-16493766-20150312161831

I think it may be that you have too many things to upload. In your Preferences, in "Under the Hood", do you have your edit count settings to more that 500? If you do, then it will make the page take a while to load.