Consoles are not PCs. They have very specialized, specific hardware that serves very specialized, specific purposes and before a PC can run those games, it has to first *emulate* the environment of the console, *then* run the game through that emulation.
When you run that same game on the console it was originally designed to run on, it doesn’t have to emulate anything.
Emulation can be costly. It’s an entire process your device has to run in addition to running the game.
Running just the game = smooth.
Running game through emulator = extra work = less smooth.
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