does doing an unchecked cast of the return value of the aget on the byte array change things?
(defn test-fn [] (let [obj-ary (object-array 10) byte-data (byte-array (range 10))] (doseq [idx (range 10)] (let [idx (int idx)] (aget obj-ary idx (bit-and 0xFF (unchecked-long (aget byte-data idx)))))))) This disassembled clearer and I think dropped the long cast. On Wed, Jan 30, 2019 at 3:03 PM Brian Craft <craft.br...@gmail.com> wrote: > Profiling is showing a lot of time spent in RT.longCast, in places like > this: > > (aget flat-dict (bit-and 0xff (aget arr j))) > > arr is hinted as ^bytes, and flat-dict as ^objects. > > which compiles to this: > > Object code2 = RT.aget((Object[])flat_dict, RT.intCast(0xFFL & > RT.longCast((Object)RT.aget((byte[])arr2, RT.intCast(k))))) > > Is there any way to avoid that RT.longCast? There is an aget method in > RT.java that returns a byte, and a longCast for byte, but I suspect the > cast to Object is causing it to hit the longCast for Object, which does a > bunch of reflection. > > -- > 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/d/optout. > -- 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/d/optout.