The first time a user enters a new area or performs a new attack, the emulator stutters. Yuzu translates the Switch shader into a format the PC GPU can read. Instead of discarding this translation after it is used, Yuzu saves it to a file on the user's hard drive (the "Cache").
Buttery smooth 60 FPS with no hitches.
Yuzu actually uses two distinct caches, often confused by beginners: yuzu shader cache
