Terrible slow when building to iOS on MAC

I could build an empty walk-through scene to iOS device
Now I’m trying to building ScifiHallWay scene to device too
But it’s terrible slow almost 1h40minutes and still continuing
Is there any setting to make it faster?

Hi Batigol,

Thank you for taking the time to report this issue and we appreciate your patience while awaiting a response. In order to assist you in an effective manner, we would like to see if you are still having a problem with slow build times for iOS using engine version 4.9.2 on a Mac…

If so, please provide some simple steps, screenshots, or any other relevant pieces of information to help us reproduce the issue on our end and we will investigate the problem.

Thank you for your feedback and cooperation,

.