1 files changed, 142 insertions, 0 deletions
diff --git a/okio/jvm/jmh/src/jmh/java/com/squareup/okio/benchmarks/Utf8Benchmark.java b/okio/jvm/jmh/src/jmh/java/com/squareup/okio/benchmarks/Utf8Benchmark.java
new file mode 100644
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--- /dev/null
+++ b/okio/jvm/jmh/src/jmh/java/com/squareup/okio/benchmarks/Utf8Benchmark.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2018 Square, Inc. and others.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.squareup.okio.benchmarks;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+import org.openjdk.jmh.Main;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.runner.RunnerException;
+
+@Fork(1)
+@Warmup(iterations = 5, time = 2)
+@Measurement(iterations = 5, time = 2)
+@State(Scope.Benchmark)
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.SECONDS)
+public class Utf8Benchmark {
+  private static final Charset utf8 = StandardCharsets.UTF_8;
+  private static final Map<String, String> strings = new HashMap<>();
+
+  static {
+    strings.put(
+        "ascii",
+        "Um, I'll tell you the problem with the scientific power that you're using here, "
+            + "it didn't require any discipline to attain it. You read what others had done and you "
+            + "took the next step. You didn't earn the knowledge for yourselves, so you don't take any "
+            + "responsibility for it. You stood on the shoulders of geniuses to accomplish something "
+            + "as fast as you could, and before you even knew what you had, you patented it, and "
+            + "packaged it, and slapped it on a plastic lunchbox, and now you're selling it, you wanna "
+            + "sell it.");
+
+    strings.put(
+        "utf8",
+        "Սｍ, I'll 𝓽𝖾ll ᶌօ𝘂 ᴛℎ℮ 𝜚𝕣०ｂl𝖾ｍ ｗі𝕥𝒽 𝘵𝘩𝐞 𝓼𝙘𝐢𝔢𝓷𝗍𝜄𝚏𝑖ｃ 𝛠𝝾ｗ𝚎𝑟 𝕥ｈ⍺𝞃 𝛄𝓸𝘂'𝒓𝗲 υ𝖘𝓲𝗇ɡ 𝕙𝚎𝑟ｅ, "
+            + "𝛊𝓽 ⅆ𝕚𝐝𝝿'𝗍 𝔯𝙚𝙦ᴜ𝜾𝒓𝘦 𝔞𝘯𝐲 ԁ𝜄𝑠𝚌ι𝘱lι𝒏ｅ 𝑡𝜎 𝕒𝚝𝖙𝓪і𝞹 𝔦𝚝. 𝒀ο𝗎 𝔯𝑒⍺𝖉 ｗ𝐡𝝰𝔱 𝞂𝞽һ𝓮𝓇ƽ հ𝖺𝖉 ⅾ𝛐𝝅ⅇ 𝝰πԁ 𝔂ᴑᴜ 𝓉ﮨ၀𝚔 "
+            + "т𝒽𝑒 𝗇𝕖ⅹ𝚝 𝔰𝒕е𝓅. 𝘠ⲟ𝖚 𝖉ⅰԁ𝝕'τ 𝙚𝚊ｒ𝞹 𝘵Ꮒ𝖾 𝝒𝐧هｗl𝑒𝖉ƍ𝙚 𝓯૦ｒ 𝔂𝞼𝒖𝕣𝑠𝕖l𝙫𝖊𝓼, 𐑈о ｙ𝘰𝒖 ⅆە𝗇'ｔ 𝜏α𝒌𝕖 𝛂𝟉ℽ "
+            + "𝐫ⅇ𝗌ⲣ๐ϖ𝖘ꙇᖯ𝓲l𝓲𝒕𝘆 𝐟𝞼𝘳 𝚤𝑡. 𝛶𝛔𝔲 ｓ𝕥σσ𝐝 ﮩ𝕟 𝒕𝗁𝔢 𝘴𝐡𝜎ᴜlⅾ𝓮𝔯𝚜 𝛐𝙛 ᶃ𝚎ᴨᎥս𝚜𝘦𝓈 𝓽𝞸 ａ𝒄𝚌𝞸ｍρl𝛊ꜱ𝐡 𝓈𝚘ｍ𝚎𝞃𝔥⍳𝞹𝔤 𝐚𝗌 𝖋ａ𝐬𝒕 "
+            + "αｓ γ𝛐𝕦 𝔠ﻫ𝛖lԁ, 𝚊π𝑑 Ь𝑒𝙛૦𝓇𝘦 𝓎٥𝖚 ⅇｖℯ𝝅 𝜅ո𝒆ｗ ｗ𝗵𝒂𝘁 ᶌ੦𝗎 ｈ𝐚𝗱, 𝜸ﮨ𝒖 𝓹𝝰𝔱𝖾𝗇𝓽𝔢ⅆ і𝕥, 𝚊𝜛𝓭 𝓹𝖺ⅽϰ𝘢ℊеᏧ 𝑖𝞃, "
+            + "𝐚𝛑ꓒ 𝙨l𝔞р𝘱𝔢𝓭 ɩ𝗍 ہ𝛑 𝕒 ｐl𝛂ѕᴛ𝗂𝐜 l𝞄ℼ𝔠𝒽𝑏ﮪ⨯, 𝔞ϖ𝒹 ｎ𝛔ｗ 𝛾𝐨𝞄'𝗿𝔢 ꜱ℮ll𝙞ｎɡ ɩ𝘁, 𝙮𝕠𝛖 ｗ𝑎ℼ𝚗𝛂 𝕤𝓮ll 𝙞𝓉.");
+
+    // The first 't' is actually a '𝓽'
+    strings.put(
+        "sparse",
+        "Um, I'll 𝓽ell you the problem with the scientific power that you're using here, "
+            + "it didn't require any discipline to attain it. You read what others had done and you "
+            + "took the next step. You didn't earn the knowledge for yourselves, so you don't take any "
+            + "responsibility for it. You stood on the shoulders of geniuses to accomplish something "
+            + "as fast as you could, and before you even knew what you had, you patented it, and "
+            + "packaged it, and slapped it on a plastic lunchbox, and now you're selling it, you wanna "
+            + "sell it.");
+
+    strings.put("2bytes", "\u0080\u07ff");
+
+    strings.put("3bytes", "\u0800\ud7ff\ue000\uffff");
+
+    strings.put("4bytes", "\ud835\udeca");
+
+    // high surrogate, 'a', low surrogate, and 'a'
+    strings.put("bad", "\ud800\u0061\udc00\u0061");
+  }
+
+  @Param({"20", "2000", "200000"})
+  int length;
+
+  @Param({"ascii", "utf8", "sparse", "2bytes", "3bytes", "4bytes", "bad"})
+  String encoding;
+
+  String encode;
+  byte[] decodeArray;
+
+  @Setup
+  public void setup() {
+    String part = strings.get(encoding);
+
+    // Make all the strings the same length for comparison
+    StringBuilder builder = new StringBuilder(length + 1_000);
+    while (builder.length() < length) {
+      builder.append(part);
+    }
+    builder.setLength(length);
+
+    // Prepare a string and byte array for encoding and decoding
+    encode = builder.toString();
+    decodeArray = encode.getBytes(utf8);
+  }
+
+  @Benchmark
+  public byte[] stringToBytesOkio() {
+    return BenchmarkUtils.encodeUtf8(encode);
+  }
+
+  @Benchmark
+  public byte[] stringToBytesJava() {
+    return encode.getBytes(utf8);
+  }
+
+  @Benchmark
+  public String bytesToStringOkio() {
+    // For ASCII only decoding, this will never be faster than Java. Because
+    // Java can trust the decoded char array and it will be the correct size for
+    // ASCII, it is able to avoid the extra defensive copy Okio is forced to
+    // make because it doesn't have access to String internals.
+    return BenchmarkUtils.decodeUtf8(decodeArray);
+  }
+
+  @Benchmark
+  public String bytesToStringJava() {
+    return new String(decodeArray, utf8);
+  }
+
+  public static void main(String[] args) throws IOException, RunnerException {
+    Main.main(new String[] {Utf8Benchmark.class.getName()});
+  }
+}