Just for fun, here's an unoptimized and un-async'd haskell version I threw together: http://lpaste.net/105557 http://lpaste.net/105557 It takes about a second

Just for fun, here's an unoptimized and un-async'd haskell version I threw together: http://lpaste.net/105557 http://lpaste.net/105557 It takes about a second. I expected it to be faster than node and php, but it being this much faster makes me think I got something wrong. The files generated aren't all the same.