[the_mat]

To me, there's a dichotomy between the "if it compiles, it usually works" aspect of Haskell (and how this is often touted as superior to the dynamic typing, test-driven approach) and that you can't get a picture of memory usage until you run and profile the code. In my experience, hard to understand memory consumption issues are common and take effort to solve.

Reference: http://blog.ezyang.com/2011/06/pinpointing-space-leaks-in-bi...

[gregwebs]

That blog post says nothing about frequency of memory leaks, but shows that there are good tools to help you in your effort to solve them. One thing to keep in mind is that there are memory issues with every language. I just debugged one in Ruby yesterday, and there wasn't a good tool readily available for that effort. Do you know what the memory consumption of your programs are in other languages are before running them?

As a contradictory anecdote, I have never once had a memory consumption issue with Haskell code. Haskell is actually in a nice position w/respect to memory now that enumerators (which always use constant memory) are taking hold. I have no doubt you encountered many memory leaks, but I don't think your experience completely generalises to modern Haskell.