@B2K24 Have you noticed that SDLMAME for Windows seems to drop a frame every once in a while? I'm trying to determine whether it's my computer or something else. Windows MAME doesn't behave that way for me. It'll just periodically bounce from 94% speed to 101% speed back to 100% every couple of minutes. It's not a matter of my computer being too slow, either, because if you unthrottle games they go at 200%+ speed.
Update: I see what it is now. SDLMAME in Windows is really sensitive to the other programs that are running at the same time. If you have Firefox in the background with some Youtube videos or something, it seems to suck away resources from SDLMAME. Windows MAME seems really resilient to this...I wonder if it runs with a higher priority than SDLMAME somehow.