[Haskell-cafe] Are type families really this slow, or is this a GHC bug?

Mike Izbicki mike at izbicki.me
Sat Jul 27 04:59:55 CEST 2013

Thanks for pointing to that ticket.  At first after reading through it, I
thought my mistake was not using tail call recursion.  But I updated the
type families and they actually ran slower!

I've gone ahead and reported a bug:

On Fri, Jul 26, 2013 at 1:31 PM, Jan Stolarek <jan.stolarek at p.lodz.pl>wrote:

> I don't know much about type families, but I recall this:
> http://ghc.haskell.org/trac/ghc/ticket/5321
> The bug is marked as fixed, but perhaps behaviour you observed shows that
> there are other cases
> where constraqint solver is slow. I'd consider reporting this as GHC bug.
> Janek
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