C is usually 1-4x faster than Haskell. This looks to be within 1-2x. The key takeaway for me is that you're in the range where very slight variations in implem

C is usually 1-4x faster than Haskell. This looks to be within 1-2x. The key takeaway for me is that you're in the range where very slight variations in implementation of the same algorithm make the difference between which is faster.