3 ms·

Don't you just call a library function? https://hackage.haskell.org/package/memoize-0.8.1/docs/Data-Function-Memoize.html https://hackage.haskell.org/package/me

• owl57 7y ago
  "However, it appears to work." Wow. I don't remember reading such blasphemy in other Haskell docs. And I like it, no joke. Though it's likely about the performance characteristics; memoize probably behaves (and not just appears to behave) like identity modulo performance, that's just not documented clearly enough.