With Gravity Forms enabled the customize feature of my theme is incredibly slow. It is responsive with GF plugin disabled.
Gravity Forms Version 2.5.6
Total Plus Theme Version: 1.5.3
GF No Conflict Mode is enabled
Had to increase the PHP.ini script timeout above 30 in order to be able to use the customize option
max_execution_time is now 300 (was 30)
max_input_vars is now 3000 (was 1000)