test.cljs

;; some speed tests of functions to access nested properties in JS objects.

(def test-data (->> (into {} (for [k1 (range 10)]
                               [k1 (into {} (for [k2 (range 10)]
                                              [k2 (into {} (for [k3 (range 10)]
                                                             [k3 k3]))]))]))
                    (clj->js)))



(defn aget-apply [o path]
  (apply aget o path))

(defn oget-in [js-object path]
  (reduce (fn [o p]
            (goog.object/getValueByKeys o p)) js-object path))

(defn aget-reduce [o path]
  (reduce (fn [o p]
            (aget o p)) o path))

(defn aget-loop [o path]
  (loop [cur-o o p path]
    (let [result
          (aget cur-o (first p))]
      (if-let [new-path (seq (rest p))]
        (recur result new-path)
        result))))

(defn aget-loop-nth [o path]
  (let [l (count path)]
  (loop [cur-o o i 0]
    (let [result
          (aget cur-o (first p))]
      (if-let [new-path (seq (rest p))]
        (recur result new-path)
        result)))))

(defn aget-reduce-js [o js-path]
  (.reduce js-path (fn [o k] (aget o k)) o))

(defn aget-loop-nth [o path]
  (let [l (count path)]
    (loop [o' o i 0]
      (if (< i l)
        (recur (aget o' (nth path i)) (inc i))
        o'))))

(simple-benchmark [] (aget-apply test-data ["2" "2" "2"]) 100000)        ;; --> 339msecs
(simple-benchmark [] (oget-in test-data ["2" "2" "2"]) 100000)           ;; --> 208msecs
(simple-benchmark [] (aget-reduce test-data ["2" "2" "2"]) 100000)       ;; --> 134msecs
(simple-benchmark [] (aget-loop test-data ["2" "2" "2"]) 100000)         ;; -->  84msecs
(simple-benchmark [] (aget-reduce-js test-data #js ["2" "2" "2"]) 100000);; -->  35msecs
(simple-benchmark [] (aget-loop-nth test-data ["2" "2" "2"]) 100000)     ;; --> 181msecs