Plus, the options are significantly different now, so your old command line is useless as well. You'll need to update your methodology before you can hope to get any kind of consistent results with modern builds.
Yeah, I know. I slapped a quick disclaimer up on the "howto" page saying it's out of date.
If I get time this weekend I'll throw some commands up for benchmarking MAME under various operating systems for various builds. Obviously if old and new builds are going to be in the database, there needs to be a guide for each of the major core changes, with 0.107 being a good example of such a thing.
Regardless this is a futile effort anyway.
I can tell you from experience on controls.dat you might get 10 people to help you on a regular basis and the fact that your project actually requires different pcs to test makes it an even harder thing to tackle.
All good there. There's quite a number of folks who have submitted benchmarks in the past manually. I was quite surprised at the feedback actually. I've been in contact with some of them again and they are keen to take up the cause and keep contributing.
Recently I also made a self-running CDROM that benchmarks various games. I handed it out to a number of geek mates, and they emailed me the results. When I get time, I'll add that data too.
The beauty is that the contributors don't need a great deal of technical knowledge. As soon as I get the howto part fixed, it's a matter of copy, paste, submit.
Once there's enough data in the database I'm going add a few other searches to play with the results. As they say, there are lies, damned lies, and then there are statistics. But I think it will be fun to see what interpolation of the data will try to "predict" about future MAME builds and future hardware. Always good for a laugh.

All mameworld sites are down at the moment. I have no idea why, though?
Yeah it looks like the whole of mame/mameworld sits behind the same reverse proxy or something. Everything seems busted at the moment.
If you want to get to just the database itself, it's hosted on a different server:
http://www.gamedude.com.au/arcade/benchmark/Despite numerous emails the MW kids never got back to me about database access (part of the reason it took so long to change the site). So instead I slapped it up elsewhere for the meantime.