This is probably the weakest or least well aged puzzle in AoC2015. There's likely no way to do this on a potato, unless you're into hardcore crypto algorithm cracking, which doesn't sound like a thing for 4th day puzzle. It's also unlikely that you're invited to implement MD5 yourself (even though that is not a completely impossible task), given the early day of the puzzle. So, this is basically a "run a library function a lot" task.
Since the state and outputs are basically random, so's the visualization.
