> How different would those benchmarks be if you test them with sound and graphics? Is
> there any specific methodology for doing it that way? There's obviously no
> -benchsoundgraphics commandline switch. I'm merely curious.
If anything, it's a bit of apocrypha from MAME's history.
Back in the day, running with -nosound caused MAME to specifically exclude certain driver hardware when running the game. More recently, the decision was made for MAME to always emulate the sound hardware - mostly to reduce bug reports from people running with -nosound.
So, nowadays, there shouldn't be much (if any) difference between running with -sound none and running with normal MAME. In the past, though, it might have gained you some frames per second, at the cost of potentially fucking up the emulation of the game itself.