Midway Arcade Treasures - 30FPS?

[gir489]

You were lucky if you hit 20 FPS on most games, because of throttling. It was even worse on the battery, sometimes you'd get 15FPS.

This is just a byproduct of High Level Emulation. Instead of doing 1:1 perfect emulation, the emulator is translating MIPS in to x86 and running it like an actual windows application. Because the CPUs in desktops (even at the time!) are like 100x better than the PSP CPU which is basically just a portable PS1 CPU, the games run at a solid 30 FPS in most cases.

I don't see how this is a problem. If you REALLY don't like it, you can set a 20 or 15 FPS limit in the emulator if you want terrible performance...