The WordPress customizer is awesome but it can also be a bit slow when you have tons of options. For this reason I added a panel where you can quickly and easily enable/disable different sections. For example if all you are changing is the header you can disable everything except the header before launching the Customizer to make things blazing fast.
Enable/Disable Customizer Sections
Disabling a section simply stops it from showing up in the Customizer it will NOT reset any of your options.