On 7/22/13 7:41 PM, David Thomas wrote: > On Mon, Jul 22, 2013 at 4:04 PM, wren ng thornton <w...@freegeek.org> wrote: >> In principle, we could translate between these two forms (the f2 ==> f1 >> direction requires detecting that y does not depend on x). However, in >> practice, the compiler has no way to decide which one is better since it >> involves a space/time tradeoff which: (a) requires the language to keep >> track of space and time costs, (b) would require whole-program analysis to >> determine the total space/time costs, and (c) requires the user's >> objective function to know how to weight the tradeoff ratio. > > I, for one, would love to have a compiler do (a) based on (b), my > specification of (c), and the ability to pin particular things...
Oh, so would I! But, having worked on this problem in a different language, I'm well aware of how difficult it is to actually implement (a) and (b). -- Live well, ~wren _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
