On Mon, Dec 29, 2008 at 9:36 PM, Aaron Brooks <aa...@brooks1.net> wrote: > > In Clojure (anybody correct me if I'm wrong) I think it's preferable > for performance reasons to use reduce instead of apply when you can.
I actually think that's backwards. In many cases it doesn't really matter. It's common to do what + currently does, and that is call reduce internally if given more than 2 arguments. However, it's possible for a function to do something more clever when called via apply, because it controls any looping itself. The 'str' function, for example, uses a single StringBuilder internally when given more than 1 argument, so it's much more efficient to call (apply str foo) than (reduce str foo) for large collections. user=> (time (last (reduce str (range 30000)))) "Elapsed time: 5570.028441 msecs" \9 user=> (time (last (apply str (range 30000)))) "Elapsed time: 54.140901 msecs" \9 --Chouser --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
