Will identical? correctly handle keywords under advanced compilation, with keywords constants emited?
On Wed, Aug 28, 2013 at 3:29 PM, David Nolen <dnolen.li...@gmail.com> wrote: > ClojureScript has long represented symbols and keywords as JavaScript > Strings as a performance optimization around hash maps. However modern > JavaScript engines have shown that following Clojure JVM's design more > closely consistently delivers better performance. > > Also the representation of keywords as strings has had an unfortunate > consequence, we modify the String prototype to allow keywords to be called > as functions - this is a serious interop liability. > > Sean Grove has done some excellent work that I have further extended in a > branch. In this branch keywords are represented with a deftype. In order to > deliver performance, under advanced optimizations we emit keywords > constants to avoid allocation overheads. > > The breaking change is that keywords in ClojureScript cannot support the > identical? property guaranteed by Clojure on the JVM. There is a new > equality check called keyword-identical? that can be used to efficiently > check for keyword equality. defrecords and hash maps have been updated to > use this predicate. > > Please try your projects with this branch so we can address any further > issues because of this breaking change. > > http://github.com/clojure/clojurescript/compare/keywords > > Thanks, > David > > -- > -- > 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.
