Re:When Does Point-Free Notation Make Code More Readable?
by mrkgnao on Friday September 29, 2017 @11:34AM
(#15366181)
I won't comment on Haskell's speed here, but function composition can't possibly be making Haskell less faster.
The reason is simple: the compiler inlines the composition operator in the vast majority of (probably all?) cases, since the Haskell standard library source code marks it with an INLINE pragma:
-- | Function composition.
{-# INLINE (.) #-}
(.) :: (b -> c) -> (a -> b) -> a -> c
(.) f g = \x -> f (g x)
The reason is simple: the compiler inlines the composition operator in the vast majority of (probably all?) cases, since the Haskell standard library source code marks it with an INLINE pragma:
http://hackage.haskell.org/package/base-4.10.0.0/docs/src/GH....