Dumping frames is very performance-heavy on the video thread.
If you want Mario to walk at a normal speed relative to the emulation speed, try disabling dual core. (Note: Rather than making Mario walk faster, this will most likely slow down emulation.)
If you want Mario to walk at a normal speed relative to the emulation speed, try disabling dual core. (Note: Rather than making Mario walk faster, this will most likely slow down emulation.)