Changes on config.yml not ocurring

Hey guys, i think i have a problem here.

I was trying to get some fps by changing "Preferred SPU Threads" and "SPU Delay Penalty" directly on config.yml but no matter the changes i make i always get the same amount of fps all the time, it's like i'm not changing anything at all. I can't make the emulator run slower or faster by messing with configs. Any ideas for this problem?

MY PC:
AMD FX™-6300 Six-Core Processor | 6 Threads | 7.98 GiB RAM | AVX
GeForce GT 1050

Maybe these options don't matter for this particular game? Maybe you are using custom config for the specific game.

Maybe these options don't matter for this particular game? Maybe you are using custom config for the specific game.

Thing is, i've already seen people improve fps rate by making this changes, it's simply not working the same way for me. The game i am talking about is Persona 5.