Something I found about going to Haskell from <any other language> is that Haskell provides many powerful abstractions without compromising on performance. Espe

Something I found about going to Haskell from <any other language> is that Haskell provides many powerful abstractions without compromising on performance. Especially programmer's performance. If you do not need to write notoriously slow code in Haskell, just don't do it. Use libraries (containers and mtl especially great), keep state strict (a handful of bang patterns). I use Haskell's laziness with great success (look for paper "generating power of lazy semantics" it's fascinating; look "the essence of functional programming" for even more fascination). I use Haskell's flexibility with great success (how about beating C speed ten times? how about parallelization to all cores with couple lines of code?). It is really great language. BTW, Haskell's RTS reuse chunk type field which is needed for implementation of laziness for synchronization and it is great! This means that it can provide everything that Java and/or .Net provides and get away with twice as less overhead for it.