I just posted the source for MAME TG3. This is a public release with all encryption removed. I'm also going to submit this to the MAME Dev people, as it could be a useful tool in finding if MAME bogs down in a particular area.(posted 9501 days ago)The URL is: http://www.snipercade.com/cubeman
It has been tested to a reasonable degree, and any feedback is welcome. If MAME 35 Final has a slowdown or bug, then MAME TG3 will have the same bug. When MAME 36 Final becomes available, I'll make a corresponding version.