I'm using a Raspberry Pi with RetroPie and I'm quite happy with it; there's only one exception: when I choose a file to launch inside emulationstation, usually it only takes few moments to load the emulator and the file. BUT when I exit the emulator to go back to emulationstation it takes a lot of time. Really! Sometimes it takes up to 20-25 seconds to go back to the launcher.
I already tried to install RetroPie on a faster micro-sd card (I believe it's a class 10 card), but IMHO it's still really slow.
Please, could you tell me if there is anything I can do on the configuration to speed up this process ?