Home Exploiting Vector Instructions with Generalized Stream Fusion Exploiting Vector Instructions with Generalized Stream Fusion By Geoffrey Mainland, Roman Leshchinskiy, and Simon Peyton Jones. A.k.a. "Haskell beats C". Our ideas are implemented in modified versions of the GHC compiler and vector library. Benchmarks show that high-level Haskell code written using our compiler and libraries can produce code that is faster than both compiler- and hand-vectorized C. This paper continues the promising line of research started in 1990 by Wadler (at least, that was how I learned of deforestation). Of course, there was a lot of development since then, but this specific paper introduces an interesting idea of multiple representations - potentially changing the game.