Stackoverflow Many commonly asked Haskell questions have been given excellent answers on Stack Overflow: Profiling¶ Basics (note: quite old) Performance¶ Haskell speed vs C Why is Haskell fast? Weak head normal form¶ What is it? Strictness annotations Haskell's type system¶ The tradeoffs of Haskell's type system Recursion¶ foldr vs foldl' Memoization¶ Pure memoization