Why is the emulator game playing so slow?!?
First, they are running purely on the PSP’s processor. There is no graphics acceleration like on the official UMD games for PSP. Second, these emulators are new and hence not fully living up to their potential and some have quite a few bugs. However, most emus have settings which can compensate for the slowdown. Enabling Frameskip (3-4 frames), increasing the CPU speed (266-333mhz), and turning off the sound or lowering the quality of sound is sometimes necessary in order for some games to run at a decent speed. It will vary game to game – experiment and see what works best for you!!