problem with the speed of hummindird after upgrades

hello.
hummindird was working ok. after some late upgrades it start to get very slow on my web site.
I use Extra theme. all metrics come perfect. but speed is terible.
I deactivate all plugins and check again. nothing.
Plus Browser Caching is not working. my server is apache + ngix.
module mod_expires for Apache is on. for ngix i am waiting for a confirmation ( i ask long time a go and it was and made the changes that you recommend).
Also Super-minify my files is not working.
Also it would be nice if you make a nice post on how to use redis and some advance tips on speed.

You can see the difference on the speed with two pages.

and

Thanks a lot