It seems that since Fortnite switched to the Unreal engine in Season 2 Chapter 2 some user have found that TimerResolution improves the game play. Some users are claiming using TimerResolution gives them more responsive game play, higher FPS, and lower ping times in Forenite. As always, the results you will get will depend on the system you are using, the drivers you have installed, and what other software you have running.
Make sure you download an install the genuine and original Timer Resolution here – https://www.lucashale.com/timer-resolution/
This will provide trouble free installation and supports Windows 10 with timers resolutions down to 0.5ms