Ooo... sorry for the side-question, but I noticed that your code doesn't seem to use coercions for primitives and uses type-hints instead.
I was just asking the other day on #clojure why Clojure had coercion functions at all and why type hints didn't work for primitives, does this mean 1.2 will get rid of coercions (or make them no longer necessary) and allow type-hints for primitives? If so, that's really awesome. :-D On Jun 30, 2010, at 9:27 PM, j-g-faustus wrote: > I'm getting some form of boxing during array access, even on the equiv > branch. > > Speaking of which: (type (+ 1N 1)) => clojure.lang.BigInt means that > I'm using the correct branch, right? > > Here is a simple speed test comparing 3-element vectors using Java > arrays, immutable deftype and mutable deftype: > http://gist.github.com/459383 > > Using the equiv branch, I get > * Java arrays: 18s > * Immutable deftype: 10s > * Mutable deftype: 2s > * Plain Java: 2s > > Here is a profiler snapshot for the array case, where > java.lang.Number.init(), java.lang.Double.init() and > java.lang.Double.valueOf() take a significant chunk of the CPU time: > http://i589.photobucket.com/albums/ss334/j-g-faustus/profiling/eqv-arrays.png > > From a practical standpoint I guess it means that deftype is the way > to go if you want fast numbers today. > In this case even the immutable deftype was faster than mutable Java > arrays, so you can be fast, idiomatic and thread-safe simultaneously. > > For the future, it would be nice if Java arrays were equally fast. > There is unchecked-inc-int and -long, would there be room for an > unchecked-aget/aset-int/long/double? > > > Regards > jf > > > On Jun 30, 6:14 pm, David Nolen <dnolen.li...@gmail.com> wrote: >> On Wed, Jun 30, 2010 at 10:19 AM, j-g-faustus >> <johannes.fries...@gmail.com>wrote: >> >> On the equiv branch I don't see this at all. Also on the equiv branch most >> of your type hints inside the fn are unnecessary. >> > > -- > 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 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
