[squiggleblaz]

I was hoping for a massive parallel solution! You just run the same function on a million cores at once, with different inputs.

But I think there's a big difference between a language that lets you expect that iteration b will happen after iteration a, vs a language that merely gives you guarantee the result is derived from application of the function onto the necessary inputs.

The latter can be correctly parallelised, but the former can only ever be executed in serial. `map f [1,2,3]` (in Haskell) can be solved in parallel or in serial. `[1,2,3].map(f)` (in modern JS) must be executed in serial, since f might be the result of `() => { var j = 0; return (i) => { j += i; return j }}`.