I'm not sure if it's the emulator or the ROM, but...
Whenever I play Pokemon White 2, my FPS is pretty high (like in the 60s) and whenever I save it goes down to 4 FPS and it's super annoying having to wait forever. I chose Oshawott as my starter considering it seemed like it affected it because it started happening after it evolved into Samurott.
Me being me, I just deleted the game (this was before the emulator was updated on non jailbreak)
This time I chose as Snivy, everything went well, I got a Gardevoir and it seemed like the problem went away until super recently, I reached Castelia City and entered a building that contained the TM Attract. Before entering this building, I was able to save perfectly fast and now it's down to 4 FPS again.
Now I'm not so sure if it's because I entered the building or it's the amount of time I've played which is 8 hours and 10 minutes since the slow save has been happening. Both factors seem logical or it could be something else.
I don't know if this is where I should be asking for assistance about this problem considering its a Pokemon game, but I thought someone else may have the same problem, or if someone has a solution or if it's a bug in the emulator.
I really don't like having to wait 5 minutes so I might start to not play it anymore even though I want to!
Please help, thanks in advance.