In my opinion space leaks are a big deal in Haskell. I come across them fairly often and they cause big problems for the kind of software I write. Luckily the

In my opinion space leaks are a big deal in Haskell. I come across them fairly often and they cause big problems for the kind of software I write. Luckily they are also easy to avoid. I wrote an article about how to eliminate half of them: http://h2.jaguarpaw.co.uk/posts/make-invalid-laziness-unrepresentable/ http://h2.jaguarpaw.co.uk/posts/make-invalid-laziness-unrepr... (the other half are eliminated by disabling the full-laziness transformation).