Not really directly answering the question here but, since you are on 10.5, have you considered switching to CIAs? You're on a downgradable/"exploitable" version so it's definitely something to think about. You can either install MenuHax + a CFW (on an EmuNAND/RedNAND setup) or install A9LH + a CFW (on Updated SysNAND or EmuNAND/RedNAND).
This way you can have your games on the home menu, no delay switching, and be assured to have good speeds with a good SD card. If you have a New 3DS, you'll even be able to easily run it on the 800+ Hz clock speed with Luma3DS.
I own a Sky3DS v2 (blue button), and there's no going back to that after being CFWed (thanks to A9LH).