This is copy paste from anonymous user so it's thread instead of talk page edit:
I've discovered that:
Some video proof: https://www.youtube.com/watch?v=0heCdJk_oU4 (sorry about the low quality)
These findings make sense, as the game data instructs the game VM how long each frame should be displayed. This means, essentially, that the game runs at a varying FPS, and runs on modern computers at the same FPS as originally designed.