Solution: Enabled precompiled header settings in all targets
Before build time: ~6min 49 secs
Stop  Time: Fri 03/04/2016  8:29:50.13
Start Time: Fri 03/04/2016  8:23:00.28

After build time: ~4min 19 secs
Stop  Time: Fri 03/04/2016 12:12:10.24
Start Time: Fri 03/04/2016 12:07:51.78