Yes, It works!
I was experiencing the same problem... Too slow when browsing the site and even more slow when using the admin page.
I do not have use for the auto save option, so disabling it is not a problem at all.
I just used the above code in both my sites and the problem is resolved!
http://www.copamundial2014brasil.com.br and http://www.precodehotel.com.br.