Here’s a simple program I wrote on a whim tonight, to take a very basic look at GHC’s low-level threading performance. module Main where import Control.Applicative import Control.Concurrent.MVar import Control.Concurrent import Data.Time import System.Environment main = do mv <- newEmptyMVar…

Applicative functors are gorgeous and versatile creatures, but as is common in Haskell, they lack a little in documentation. The paper that Conor and Ross wrote introducing them is good, but dense. What if we were to skip all the…