You need to make sure that you are running with server settings. If you are using lein, it's likely that this is not the case unless you have overridden lein's defaults in your project.clj.
On Wed, Feb 5, 2014 at 5:30 PM, Glen Fraser <holag...@gmail.com> wrote: > Thanks, yes, the version starting with 0.0 in the loop (rather than 0) > does run faster. In my case, about 13% faster (19.7 seconds -- for the > code you pasted below, with *unchecked-math*, type hints and starting x of > 0.0 -- vs 22.7 seconds for my original version). But if you start with x > of 0 (integer), the type-hinted version runs notably slower. In all cases, > though, at least you get the same final answer… (-; > > So I don't see that 50% speedup you're seeing, but I do see improvement. > I'm on Clojure 1.5.1, and Java 1.7.0_51 on OS X 10.8.5, running in an > nREPL (cider) in Emacs. Possibly other JDK versions have more > optimizations? > > Thanks > Glen. > > On Feb 5, 2014, at 10:56 PM, David Nolen <dnolen.li...@gmail.com> wrote: > > (set! *unchecked-math* true) > (defn g ^double [^double x] (+ (Math/sin (* 2.3 x)) (Math/cos (* 3.7 x)))) > (time (loop [i 100000000 x 0.0] (if (pos? i) (recur (dec i) (g x)) x))) > > This is nearly 50% faster than the original version on my machine. Note > that x is bound to 0.0 in the loop, which allows the optimized g to be > invoked. > > > On Wed, Feb 5, 2014 at 4:41 PM, Glen Fraser <holag...@gmail.com> wrote: > >> Thanks to both of you for these suggestions, they're good to know. In my >> specific case, setting the *unchecked-math* flag true did indeed speed >> things up slightly (by about 6%). The other change, though, with the >> double type hints (I assume that's what those are), actually ran notably >> slower (over 20% slower!). >> >> Glen. >> >> On Feb 5, 2014, at 8:13 PM, David Nolen <dnolen.li...@gmail.com> wrote: >> >> Also: >> >> (defn g ^double [^double x] (+ (Math/sin (* 2.3 x)) (Math/cos (* 3.7 x)))) >> >> >> On Wed, Feb 5, 2014 at 2:07 PM, Alex Miller <a...@puredanger.com> wrote: >> >>> Others have answered with many useful bits but I would mention that it >>> would possibly make a significant performance difference if you added this >>> to your code: >>> >>> (set! *unchecked-math* true) >>> >>> >>>> >> > -- > 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 > Note that posts from new members are moderated - please be patient with > your first post. > 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 > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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 Note that posts from new members are moderated - please be patient with your first post. 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
