testing url query string parsing in clojure

core.clj

(ns toy-url-decoder.core
  (:require [cemerick.url :as c-url]
            [criterium.core :as crit])
  (:import [java.net URI URL]
           [io.netty.handler.codec.http QueryStringDecoder]
           [java.nio.charset Charset]
           [org.apache.http.client.utils URLEncodedUtils]
           [org.apache.http NameValuePair]
           [java.util List Map Map$Entry]))

(def url-str "https://gardenscapes.onelink.me/5r3b/3c3dfcaa?fbclid=IwAR2Sfp7ZeXjTtXXYqlymgFFX10wTWCRkkSyyHlH2Tp0SNqI7ikcKN1YIQ_4&pid=googleadwords_int&c=brand&is_retargeting=true")

(defn get-query [^String uri-str]
  (.getQuery (java.net.URI. uri-str)))

(defn ^String get-path-and-query [^String uri-str]
  (let [uri (java.net.URI. uri-str)]
    (clojure.string/join "?" [(.getPath uri) (.getQuery uri)])))

(defn cemerick-decode [url-str]
  (-> url-str
      get-query
      c-url/query->map))

(defn netty-decode [url-str]
  (let [decoder (QueryStringDecoder. (get-path-and-query url-str) ^Charset (Charset/forName "UTF-8"))]
    (persistent!
      (reduce (fn [m ^Map$Entry entry] 
                (assoc! m (.getKey entry) (.get ^List (.getValue entry) 0))) 
              (transient {})
              (.parameters decoder)))))

(defn apache-decode [url-str]
  (persistent!
    (reduce (fn [m ^NameValuePair nvp] 
              (assoc! m (.getName nvp) (.getValue nvp)))
            (transient {})
            (URLEncodedUtils/parse ^String url-str (Charset/forName "UTF-8")))))
 
(defn bench []
  (println "cemerick")
  (crit/quick-bench (cemerick-decode url-str))
  (println "netty")
  (crit/quick-bench (netty-decode url-str))
  (println "apache")
  (crit/quick-bench (apache-decode url-str))
  (println "netty-java-only")
  (crit/quick-bench (.parameters (QueryStringDecoder. (get-path-and-query url-str) ^Charset (Charset/forName "UTF-8"))))
  (println "apache-java-only")
  (crit/quick-bench (URLEncodedUtils/parse ^String url-str (Charset/forName "UTF-8"))))

;;;; results

cemerick
Evaluation count : 45816 in 6 samples of 7636 calls.
             Execution time mean : 13.743054 µs
    Execution time std-deviation : 1.181876 µs
   Execution time lower quantile : 13.129236 µs ( 2.5%)
   Execution time upper quantile : 15.770389 µs (97.5%)
                   Overhead used : 7.250206 ns

Found 1 outliers in 6 samples (16.6667 %)
	low-severe	 1 (16.6667 %)
 Variance from outliers : 15.6886 % Variance is moderately inflated by outliers
netty
Evaluation count : 102294 in 6 samples of 17049 calls.
             Execution time mean : 5.921477 µs
    Execution time std-deviation : 90.585438 ns
   Execution time lower quantile : 5.821899 µs ( 2.5%)
   Execution time upper quantile : 6.040584 µs (97.5%)
                   Overhead used : 7.250206 ns
apache
Evaluation count : 115824 in 6 samples of 19304 calls.
             Execution time mean : 5.483566 µs
    Execution time std-deviation : 435.429080 ns
   Execution time lower quantile : 5.114914 µs ( 2.5%)
   Execution time upper quantile : 6.182588 µs (97.5%)
                   Overhead used : 7.250206 ns

Found 1 outliers in 6 samples (16.6667 %)
	low-severe	 1 (16.6667 %)
 Variance from outliers : 15.5194 % Variance is moderately inflated by outliers
netty-java-only
Evaluation count : 133944 in 6 samples of 22324 calls.
             Execution time mean : 4.700735 µs
    Execution time std-deviation : 274.900681 ns
   Execution time lower quantile : 4.477565 µs ( 2.5%)
   Execution time upper quantile : 5.144789 µs (97.5%)
                   Overhead used : 7.250206 ns

Found 1 outliers in 6 samples (16.6667 %)
	low-severe	 1 (16.6667 %)
 Variance from outliers : 14.5515 % Variance is moderately inflated by outliers
apache-java-only
Evaluation count : 128154 in 6 samples of 21359 calls.
             Execution time mean : 4.731570 µs
    Execution time std-deviation : 188.660130 ns
   Execution time lower quantile : 4.596037 µs ( 2.5%)
   Execution time upper quantile : 5.054275 µs (97.5%)
                   Overhead used : 7.250206 ns

Found 1 outliers in 6 samples (16.6667 %)
	low-severe	 1 (16.6667 %)
 Variance from outliers : 13.8889 % Variance is moderately inflated by outliers