in reply to Golf: Movie style code cracker.
You could make it run for >2.5 minutes by ...
Update: Here is another one that fills in the fixed positions not left-to-right, but randomly, to look more Matrix-like. As it gets more and more characters fixed, it slows down to increase the drama (this is me trying to sell a design inefficiency as a feature). It's 124 characters.
On my machine, it looks nice doing 20-digit combinations.