Hi. Is there a perf suite for the Clojure internals? I’m trying to learn how to write fast libraries for Clojure, and now looking for quick wins on the Clojure core itself.

Currently just running criterium locally with -server -Xmx4096m JVM settings.

looking at https://dev.clojure.org/jira/browse/CLJ-1517, not sure if the microbenchmarks are showing the real thing.

One quick win would be to make destructuring less costly. Current:

(defrecord XY [x y])

(def a-map {:x 1, :y 2})
(def a-record (map->XY a-map))

;; 59ns
(cc/quick-bench
  (let [{:keys [x y]} a-map]
    [x y]))

;; 61ns
(cc/quick-bench
  (let [{:keys [x y]} a-record]
    [x y]))

My current branch:

;; 30ns
(cc/quick-bench
  (let' [{:keys [x y]} a-map]
        [x y]))

;; 17ns
(cc/quick-bench
  (let' [{:keys [x y]} a-record]
        [x y]))

Should I just embed the local criterium results into the jira issue or should I also add a leiningen perf profile with the perf tests into the proposed patch?