Benchmarking for tuple performance

clj-1.8.0-alpha2-tuple-perf.clj

;; *clojure-version*
;; (require '[taoensso.encore :as encore])

(let [v [1 2 3 4]
      x 1
      y 2
      z 3]

  (encore/qbench ; Returns fastest of 3 sets of lap times for each form, in msecs
    1000000 ; Number of laps
    (conj   v 5)                     ;   82.06  ->  82.53   ;  1.0x
    (assoc  v 1 "boo")               ;  110.96  ->  94.83   ;  1.2x
    (subvec v 1 3)                   ;   80.59  ->  79.92   ;  1.0x
    (assoc {} :v1 v :v2 v :v3 v)     ;  364.08  -> 453.77   ;  0.8x
    [x y z]                          ;  112.33  -> 118.52   ;  0.9x
    (let [[x y z] v])                ;  234.74  -> 190.26   ;  1.2x
    (peek  v)                        ;   67.59  ->  66.81   ;  1.0x
    (pop   v)                        ;   84.09  ->  70.72   ;  1.2x
    (seq   v)                        ;   84.83  ->  87.03   ;  1.0x
    (reduce (fn [acc in]) nil v)     ;  215.07  -> 116.22   ;  1.9x ; Faster
    (mapv inc v)                     ;  404.19  -> 192.46   ;  2.1x ; Faster
    (into [0] v)                     ;  585.51  -> 337.02   ;  1.7x ; Faster
    (count v)                        ;   41.05  ->  42.77   ;  1.0x
    (seq   v)                        ;   84.67  ->  85.12   ;  1.0x
    (rseq  v)                        ;   70.44  ->  70.31   ;  1.0x
    [[[x y z] y z] y z]              ;  278.53  -> 278.72   ;  1.0x
    (hash [[[x y z] y z] y z])       ;  648.10  -> 575.27   ;  1.1x
    (hash [x y z])                   ;  271.99  -> 266.74   ;  1.0x
    (= v [1 2 3 "foo"])              ;  221.30  ->  90.27   ;  2.5x ; Faster
    ))

;; Clojure 1.8.0-alpha2 (current master)
[82.06 110.96 80.59 364.08 112.33 234.74 67.59 84.09 84.83 215.07 404.19 583.51 41.05 84.67 70.44 278.53 648.1 271.99 221.3]
  
;; Clojure 1.8.0-temp (mikera's clj-1517 branch using Zach Tellman's unrolled Tuples)
;; https://github.com/mikera/clojure/commit/7b9cbb804997c75c0aeeffa1e639fa0f2e0d1bda
[82.53 94.83 79.92 453.77 118.52 190.26 66.81 70.72 87.03 116.22 192.46 337.02 42.77 85.12 70.31 278.72 575.27 266.74 90.27]

;; Ratios  
[0.994 1.170 1.008 0.802 0.948 1.234 1.012 1.189 0.975 1.851 2.100 1.731 0.960 0.995 1.002 0.999 1.127 1.020 2.452]
  
;; Notes:
;; 1. All tests run at Counterclockwise REPL