@deadpool There's this section in the retroarch.cfg
# The maximum rate at which content will be run when using fast forward. (E.g. 5.0 for 60 fps content => 300 fps cap).
# RetroArch will go to sleep to ensure that the maximum rate will not be exceeded.
# Do not rely on this cap to be perfectly accurate.
# If this is set at 0, then fastforward ratio is unlimited (no FPS cap)
fastforward_ratio = 0
I don't know if this is a very healthy setting to be using, or how much it even effectively speeds things up. There doesn't seem to be a way to get the really zippy frameskipping fastforward that you find with a lot of pc emulators. At least, I haven't come across it yet.