I'm developing a site with SS3 . The site and the admin area are really slow.
I'm also worried what will happen when a realistic amount of data is loaded in, rather than the 15 pages or so i have added to test.
Running page speed analysis, it gets 0. I haven't seen that before so i ran it a few times : )
It takes around 3 seconds to go from a list view to an edit screen in the admin area.
adding in all the htaccess performance wizadry from html5 boilerplate increases page speed score but dosn't really speed things up much. whilst i think it would be a good idea, i don't think minifying the admin area css / js is going to make much difference either, as the core issue is the server response time.
I'm on php5.4, osx, mamp pro, mysql and have 512mb of memory allocated to it. So things are only going to get worse when i upload it to the little vps in the sky.
ill upgrade to 3.1 (its not stable yet, but worth a shot i think) and see if that improves anything.