View Controller loading from storyboard taking too much time

In my case, the font assigned to control(s) was wrong.

ProximaNovaSoft-Semibold font was assigned to controls, but this font did not exist. The real font was Proxima Nova Semibold.

Because ProximaNovaSoft-Semibold did not exist, the system took time to search for this font causing a delay.

After I corrected the font for some of my controls, it loads fast.

You can check against some potential cases:

1. In VC4, are you doing something in viewWillDisappear or viewDidDisappear?

2. Make sure you are loading data asynchronously in VC4?

3. Are you doing something bulky in viewWillAppear in VC5?

4. If you go from VC1/2/3 to VC5, does it still take a lot of time?