Recently I had a lot of fun playing with the Prospero Challenge by Matt Keeter. The challenge is to render a 1024x1024 image of a quote from The Tempest by Shakespeare. The input is a mathematical formula with 7866 operations, which is evaluated once per pixel. What made the challenge particularly enticing for me personally was the fact that the formula is basically a trace in SSA-form – a linear sequence of operations, where every variable is assigned exactly once. The challenge is to eval...
