Are you a speed freak? Are you aware of, or have you written some blinding fast and clever routine?
Here's some examples:
Calculate 8 bit Julia iteration (involving complex numbers) in just *14 cycles*. Set by Chris Jam, of C64 "finely-sliced demo PAL" fame. Then he beat his own record by 2 cycles ...

Hey John,
What ever happened to Chris Jam? We had awesome 3 way programming challenges. His 38 cycles Julia plot is still a work of art...