What does high performance mode do Android?

Galaxy Note 10 high performance mode increases system speed, or so it says. All Samsung phones in the last couple of years have come with various power saving modes to allow users to enhance battery life on their device when they need it.

How do I enable performance mode?

Performance Mode in Fortnite can be enabled and disabled through the in-game settings menu. Scroll down to Rendering Mode and select Performance (Alpha). Players will then be prompted to restart their game. Performance Mode will be enabled upon loading back into Fortnite.