I've started a wiki page, https://ghc.haskell.org/trac/ghc/wiki/OptimizeCountingGADTs , to consider optimizing GADTs that look like natural numbers but that possibly have "heavy zeros". Please take a look.
_______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs
