Mike Fricker, Unreal Engine 4 developer at Epic Games, has stated on Twitter that the next weekly update coming to Fortnite will include UE4’s new level streaming technology.
With this new technology, players will start to see the map loading twice as fast across all platforms when getting into games. Mike says that this is only one of the benefits in this new update, with others also part of the level streaming technology. Those other optimizations have not been announced yet.
Working with the team to update @FortniteGame to use UE4's level streaming. One of the many benefits coming next week: Loading into matches will be more than twice as fast on all platforms!
— Mike Fricker (@mike_fricker) January 12, 2018