Hi,
Am Dienstag, den 16.12.2014, 09:59 -0500 schrieb Richard Eisenberg: > On Dec 16, 2014, at 4:01 AM, Joachim Breitner <m...@joachim-breitner.de> > wrote: > > > another guess (without looking at the code, sorry): Are they in the same > > module? I.e., can GHC specialize the code to your particular Monad? > No, they're not in the same module. I could also try moving the > zipWithAndUnzipM function to the same module, and even specializing it > by hand to the right monad. I did mean zipWithAndUnzipM, so maybe yes: Try that. (I find it hard to believe that any polymorphic monadic code should perform well, with those many calls to an unknown (>>=) with a function parameter, but maybe I’m too pessimistic here.) > Could that be preventing the fusing? There is not going to be any fusing here, at least not list fusion; that would require your code to be written in terms of functions with fusion rules. Greetings, Joachim -- Joachim “nomeata” Breitner m...@joachim-breitner.de • http://www.joachim-breitner.de/ Jabber: nome...@joachim-breitner.de • GPG-Key: 0xF0FBF51F Debian Developer: nome...@debian.org
signature.asc
Description: This is a digitally signed message part
_______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://www.haskell.org/mailman/listinfo/ghc-devs
