It could be a config issue. If you’re using OpenGL, it could also be caused by shaders, which can cause the game to stutter the first time they’re generated. Once it’s generated, it’s cached and able to be recalled quickly. But the first time it’s used, it takes a moment to generate, which can lead to stuttering.
Basically, due to shaders being generated and stored, the game will tend to get smoother as you play it more, and will likely be stutter-free (or at least, nearly stutter-free) by your second playthrough.
Technically speaking, sharing the shader cache is illegal. Just like sharing the game files is illegal. You can 100% still find complete shader caches online, and it’s just a matter of dropping them into the correct folder. But again, it’s technically illegal to do, so you’ll likely need to visit some sketchy sites with your adblocker enabled.
The shaders are akin to the uncompressed game files, which are ready to use. It’s not a perfect comparison, but that’s the short version. So the shader cache will likely be just as large as the actual game.
I'm able to play the Italian plumber game, can't remember the name, on my spare six year old OnePlus 6T Android phone with a Bluetooth 8BitDo controller. my new Google Pixel crashes when I hit the jump button. it really depeyon the hardware. Also runs great on my desktop.