Re: Lazy computation being repeated?

Tyson Whitehead wrote:

I have a program that seems to me to be exhibiting strange behaviour. Basically, it looks like something somewhere is not being updated, and this is resulting in (very expensive) computation being repeated.

Just a hunch - try recompiling your modules with -fno-state-hack. q.v. http://hackage.haskell.org/trac/ghc/ticket/2284