To override the default tiered compilation, add this to your project.clj: :jvm-opts ^:replace []
I would also recommend using a newer JDK (preferably 7, but at least 6). On Wednesday, February 5, 2014 4:34:12 PM UTC-6, David Nolen wrote: > > 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 <hola...@gmail.com<javascript:> > > 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...@gmail.com<javascript:>> >> 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 <hola...@gmail.com<javascript:> >> > 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...@gmail.com<javascript:>> >>> 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 >>> <al...@puredanger.com<javascript:> >>> > 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 clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> 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+u...@googlegroups.com <javascript:>. >> 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.
