I just went through the process of converting my map-based program over to records, hoping it would improve speed. Much to my dismay, it actually slowed my program down substantially. With some profiling, I discovered that one possible explanation is that (at least in RC4) hashing of records is about 60x slower than their map-based counterpart.
(defrecord A [x y]) => (time (dotimes [n 10000000] (hash {:x "a" :y 3}))) "Elapsed time: 90.631072 msecs" => (time (dotimes [n 10000000] (hash (A. "a" 3)))) "Elapsed time: 5549.788311 msecs" Any thoughts about why this is the case? -- -- 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.