I have tried multiple installations of Community Builder on localhost installation and each time I install it, even on a fresh Joomla! 3.6.4, access to Joomla! control panel slows down to around 45 - 60 seconds. The same happens on administration log in (the log in module loads as normal, but when I "log in" it again takes 45 - 60 seconds for the admin panel to load).
Please help!
It has taken me over 6 hours to track the problem down to Community Builder component.