"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 perform

"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.