[Xerihae]

I'm relatively certain all ROM MUDs also have this. My reasoning? If you spam in a bunch of commands and hit enter, you still move at a (relatively) sedate place. If you place the same commands in a mobprog and have the mob execute it, it's done lightning-fast because the mob has no movement/speed restrictions placed on it. I would imagine it was put in to stop people with expansive macro/alias sets from running rings around people who just type. I'm sure someone with more familiarity with the ROM coding could point out the relevant section of code, but I can't be bothered to go find it because I am lazy