Booting High Sierra from NVMe slow (30 sec. to 1 minute)

Hi, I have a Samsung 960 EVO 500 GB SSD. When I booted Windows off the drive it would literally take 2 seconds for everything to load from a complete shutdown state. Now that I installed High Sierra on it I have to wait about 30 seconds plus for the system to boot. Shutting down also takes a considerable time. This makes dual booting to Windows a pain. I also noticed when I installed games on macOS the map loading times were much longer than on Windows. I installed BlackMagic disk speed test and the speeds were as advertised (3gb/s read, 2gb/s write). Has anyone encountered and/or fixed this problem before?