In addition to that, it's often difficult to predict the runtime properties of a Haskell program. Due to it's laziness, one can often run into space leaks where

In addition to that, it's often difficult to predict the runtime properties of a Haskell program. Due to it's laziness, one can often run into space leaks where thunks are not evaluated (yet): http://blog.ezyang.com/2011/05/space-leak-zoo/ http://blog.ezyang.com/2011/05/space-leak-zoo/