core.clj

(ns cljson-shootout.core
  (:require cheshire.core clj-json.core clojure.data.json
            [criterium.core :refer :all]))



(def +json+ "{\"apple\":\"pie\", \"banana\":{\"qwertyuiopasdfghjklzxcvbnm,\":100, \"askdfj adlskfj\":[1,2,3,4,5,1,2,3,4,1,2,3,4,3,3,2,2,2,2,2,2,2,\"Whoa there!\"]}, \"anarray\":[893172,19203809,12093810928309123,1237732,123,0.111]}")


(defn cheshire-test
  []
  (cheshire.core/generate-string (cheshire.core/parse-string +json+)))

(defn clj-json-test
  []
  (clj-json.core/generate-string (clj-json.core/parse-string +json+)))

(defn clojure-data-test
  []
  (clojure.data.json/write-str (clojure.data.json/read-str +json+)))


(bench (cheshire-test))
(bench (clj-json-test))
(bench (clojure-data-test))



;; cljson-shootout.core> (bench (clojure-data-test))
;; WARNING: JVM argument TieredStopAtLevel=1 is active, and may lead to unexpected results as JIT C2 compiler may not be active. See http://www.slideshare.net/CharlesNutter/javaone-2012-jvm-jit-for-dummies.
;; WARNING: Final GC required 2.343652526891057 % of runtime

;; Evaluation count : 1147380 in 60 samples of 19123 calls.
;;              Execution time mean : 56.598605 µs
;;     Execution time std-deviation : 5.435421 µs
;;    Execution time lower quantile : 51.751088 µs ( 2.5%)
;;    Execution time upper quantile : 70.122970 µs (97.5%)
;;                    Overhead used : 146.287329 ns

;; Found 7 outliers in 60 samples (11.6667 %)
;; 	low-severe	 5 (8.3333 %)
;; 	low-mild	 2 (3.3333 %)
;;  Variance from outliers : 68.6164 % Variance is severely inflated by outliers

;; nil
;; cljson-shootout.core> 
;; cljson-shootout.core> (bench (cheshire-test))
;; WARNING: JVM argument TieredStopAtLevel=1 is active, and may lead to unexpected results as JIT C2 compiler may not be active. See http://www.slideshare.net/CharlesNutter/javaone-2012-jvm-jit-for-dummies.
;; Evaluation count : 3637440 in 60 samples of 60624 calls.
;;              Execution time mean : 17.664896 µs
;;     Execution time std-deviation : 1.737639 µs
;;    Execution time lower quantile : 16.530623 µs ( 2.5%)
;;    Execution time upper quantile : 22.542238 µs (97.5%)
;;                    Overhead used : 146.287329 ns

;; Found 8 outliers in 60 samples (13.3333 %)
;; 	low-severe	 5 (8.3333 %)
;; 	low-mild	 3 (5.0000 %)
;;  Variance from outliers : 68.6812 % Variance is severely inflated by outliers

;; nil
;; cljson-shootout.core> (bench (clj-json-test))
;; WARNING: JVM argument TieredStopAtLevel=1 is active, and may lead to unexpected results as JIT C2 compiler may not be active. See http://www.slideshare.net/CharlesNutter/javaone-2012-jvm-jit-for-dummies.
;; Evaluation count : 5769120 in 60 samples of 96152 calls.
;;              Execution time mean : 10.272698 µs
;;     Execution time std-deviation : 662.803908 ns
;;    Execution time lower quantile : 9.692697 µs ( 2.5%)
;;    Execution time upper quantile : 12.139116 µs (97.5%)
;;                    Overhead used : 146.287329 ns

;; Found 6 outliers in 60 samples (10.0000 %)
;; 	low-severe	 2 (3.3333 %)
;; 	low-mild	 4 (6.6667 %)
;;  Variance from outliers : 48.4361 % Variance is moderately inflated by outliers