After upgrade to 7.7.1 bwc take long time to fetch display

Including admin tools, email module etc with open in bwc mode take too long to load display(sometimes more than 30 seconds sometime more than 10 seconds) but for listview in accounts, calls, leads module seem like all listview is faster than 7.6

Is it usually or not ? should not 

Who has facing with same problem, do you have any idea to investigate this issue?

Sugar 7.7.1 Ent