On Fri, May 27, 2011 at 10:17:38AM +0200, José Pedro Magalhães wrote:
> 
> Can you provide more details? It's probably due to the generics stuff; maybe
> particularly the instances for base types.

Looks likely: Here are the heap profiles for compiling
ghc-prim:GHC.Tuple in the 7.0 branch and the HEAD:

http://lambda.haskell.org/~igloo/ghc-7.0-branch.png
http://lambda.haskell.org/~igloo/head.png

Incidentally, the last tuple type doesn't have a "deriving Generic"
clause.


Thanks
Ian


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