1 second freeze/stutter

[TkSilver]

Unless you got to a part of your iso of Star Ocean 1 and Persona that has an issue (either in the emulator or due to a bad rip) or.... something had to change with your PC.

Games don't suddenly stop working or change in how they work (especially over a short period of time) and over a long period of time performance ahould generally not really change (hard drives, and over heated components are exceptions)

My first test would be to take your physical copy and use a PSP to make a new iso image (heck an iso dumping function is built into the pro cfw nothing else besides a usb cable and pc needed).

The second would be to make an in game save or even better try starting a new game with no savestating and no cfw to see if it still happens. (Cheats can cause issues and savestates have a much much much higher chance of getting corrupted then in game saves.)

If both of those things check out then something did change with your PC. (Update [of any kind], something new installed, some new process running that was not running before, ect)