Corey
| On 14 July 2010 18:39, Corey O'Connor wrote:
| > I believe I have run headlong into issue #3064 in ghc
| > (http://hackage.haskell.org/trac/ghc/ticket/3064). All I think I know
| > is this:
| > * this is a performance issue with the system used to solve type
| constraints.
| > * the solver is undergoing an overhaul to resolve performance issues
| > in addition to other issues.
| > * An efficient constraint solver is difficult. NP-Complete in the general
| case?
It would be very helpful to have your code as a test case. Can you boil out a concrete program that demonstrates very poor performance of the type checker, and submit a Trac report? That way we'll test the new type inference engine against it. Lacking the example, we won't.
Which is isn't a promise that we'll solve your problem -- but it's much easier to solve if we have a concrete example. Many thanks!
Simon
