I guess it depends on your expectations. I'm working on a ~38000 SLOC Haskell program (an optimising compiler: http://futhark-lang.org http://futhark-lang.org)

I guess it depends on your expectations. I'm working on a ~38000 SLOC Haskell program (an optimising compiler: http://futhark-lang.org http://futhark-lang.org), and with GHC 8.0.1, a full build takes about 7 minutes. I can cut off a minute or two by passing `--fast` to Stack. However, even small incremental builds take a significant amount of time due to linking, which is what annoys me the most. It's still far from making me disavow Haskell, but it's definitely not among the fastest-compilable languages. This program is also too big to load in GHCi, at least on my laptop with 8GiB of memory.