Update the name of the directory for benchmarks. (#152)

2 files changed, 214 insertions, 0 deletions

diff --git a/benchmarks/pom.xml b/benchmarks/pom.xml
new file mode 100644
index 00000000..92d0c7a9
--- /dev/null
+++ b/benchmarks/pom.xml
@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>census-benchmarks</artifactId>
+
+  <name>Census Java Benchmarks</name>
+  <url>https://github.com/google/instrumentation-java</url>
+
+  <parent>
+    <groupId>com.google.census</groupId>
+    <artifactId>census-parent</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+  </parent>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.google.census</groupId>
+      <artifactId>census-core</artifactId>
+      <version>0.1.0-SNAPSHOT</version>
+    </dependency>
+    <dependency>
+      <groupId>org.openjdk.jmh</groupId>
+      <artifactId>jmh-core</artifactId>
+      <version>1.18</version>
+    </dependency>
+    <dependency>
+      <groupId>org.openjdk.jmh</groupId>
+      <artifactId>jmh-generator-annprocess</artifactId>
+      <version>1.18</version>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-shade-plugin</artifactId>
+        <version>2.2</version>
+        <executions>
+          <execution>
+            <phase>package</phase>
+            <goals>
+              <goal>shade</goal>
+            </goals>
+            <configuration>
+              <finalName>benchmarks</finalName>
+              <transformers>
+                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                  <mainClass>org.openjdk.jmh.Main</mainClass>
+                </transformer>
+              </transformers>
+              <filters>
+                <filter>
+                  <!--
+                      Shading signed JARs will fail without this.
+                      http://stackoverflow.com/questions/999489/invalid-signature-file-when-attempting-to-run-a-jar
+                  -->
+                  <artifact>*:*</artifact>
+                  <excludes>
+                    <exclude>META-INF/*.SF</exclude>
+                    <exclude>META-INF/*.DSA</exclude>
+                    <exclude>META-INF/*.RSA</exclude>
+                  </excludes>
+                </filter>
+              </filters>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-jar-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-source-plugin</artifactId>
+      </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-javadoc-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+</project>
diff --git a/benchmarks/src/main/java/com/google/instrumentation/trace/HttpPropagationUtilBenchmark.java b/benchmarks/src/main/java/com/google/instrumentation/trace/HttpPropagationUtilBenchmark.java
new file mode 100644
index 00000000..9214bc06
--- /dev/null
+++ b/benchmarks/src/main/java/com/google/instrumentation/trace/HttpPropagationUtilBenchmark.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright 2017, Google Inc.
+ * 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.google.instrumentation.trace;
+
+import com.google.common.io.BaseEncoding;
+import java.util.concurrent.TimeUnit;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+
+/** Benchmarks for {@link HttpPropagationUtil}. */
+@State(Scope.Benchmark)
+public class HttpPropagationUtilBenchmark {
+  private static final byte[] traceIdBytes =
+      new byte[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'a'};
+  private byte[] spanContextBytes;
+  private String spanContextString;
+  private static final TraceId traceId = TraceId.fromBytes(traceIdBytes);
+  private static final byte[] spanIdBytes = new byte[] {(byte) 0xFF, 0, 0, 0, 0, 0, 0, 0};
+  private static final SpanId spanId = SpanId.fromBytes(spanIdBytes);
+  private static final byte[] traceOptionsBytes = new byte[] {0, 0, 0, 1};
+  private static final TraceOptions traceOptions = TraceOptions.fromBytes(traceOptionsBytes);
+  private SpanContext spanContext;
+  private String spanContextStringHttp;
+
+  @Setup
+  public void setUp() throws Exception {
+    spanContext = new SpanContext(traceId, spanId, traceOptions);
+    spanContextStringHttp = HttpPropagationUtil.toHttpHeaderValue(spanContext);
+    spanContextBytes = new byte[16 + 8 + 4];
+    traceId.copyBytesTo(spanContextBytes, 0);
+    spanId.copyBytesTo(spanContextBytes, 16);
+    traceOptions.copyBytesTo(spanContextBytes, 24);
+    spanContextString = BaseEncoding.base16().lowerCase().encode(spanContextBytes);
+  }
+
+  /**
+   * This benchmark attempts to measure performance of {@link
+   * HttpPropagationUtil#toHttpHeaderValue(SpanContext)}.
+   */
+  @Benchmark
+  @BenchmarkMode(Mode.SampleTime)
+  @OutputTimeUnit(TimeUnit.NANOSECONDS)
+  public String toHttpHeaderValueSpanContext() {
+    return HttpPropagationUtil.toHttpHeaderValue(spanContext);
+  }
+
+  /**
+   * This benchmark attempts to measure performance of {@link
+   * HttpPropagationUtil#fromHttpHeaderValue(CharSequence)}.
+   */
+  @Benchmark
+  @BenchmarkMode(Mode.SampleTime)
+  @OutputTimeUnit(TimeUnit.NANOSECONDS)
+  public SpanContext fromHttpHeaderValueSpanContext() {
+    return HttpPropagationUtil.fromHttpHeaderValue(spanContextStringHttp);
+  }
+
+  /**
+   * This benchmark attempts to measure performance of {@link
+   * HttpPropagationUtil#toHttpHeaderValue(SpanContext)} then {@link
+   * HttpPropagationUtil#fromHttpHeaderValue(CharSequence)}.
+   */
+  @Benchmark
+  @BenchmarkMode(Mode.SampleTime)
+  @OutputTimeUnit(TimeUnit.NANOSECONDS)
+  public SpanContext toFromHttpFormatSpanContext() {
+    return HttpPropagationUtil.fromHttpHeaderValue(
+        HttpPropagationUtil.toHttpHeaderValue(spanContext));
+  }
+
+  /**
+   * This benchmark attempts to measure performance of base16 encoding from {@link
+   * HttpPropagationUtil#toHttpHeaderValue(SpanContext)}.
+   */
+  @Benchmark
+  @BenchmarkMode(Mode.SampleTime)
+  @OutputTimeUnit(TimeUnit.NANOSECONDS)
+  public String base16EncodeSpanContext() {
+    return BaseEncoding.base16().lowerCase().encode(spanContextBytes);
+  }
+
+  /**
+   * This benchmark attempts to measure performance of base16 decoding from {@link
+   * HttpPropagationUtil#fromHttpHeaderValue(CharSequence)}.
+   */
+  @Benchmark
+  @BenchmarkMode(Mode.SampleTime)
+  @OutputTimeUnit(TimeUnit.NANOSECONDS)
+  public byte[] base16DecodeSpanContext() {
+    return BaseEncoding.base16().lowerCase().decode(spanContextString);
+  }
+
+  /**
+   * This benchmark attempts to measure performance of base16 encoding and decoding from {@link
+   * HttpPropagationUtil#toHttpHeaderValue(SpanContext)} then {@link
+   * HttpPropagationUtil#fromHttpHeaderValue(CharSequence)}.
+   */
+  @Benchmark
+  @BenchmarkMode(Mode.SampleTime)
+  @OutputTimeUnit(TimeUnit.NANOSECONDS)
+  public byte[] base16EncodeDecodeSpanContext() {
+    return BaseEncoding.base16()
+        .lowerCase()
+        .decode(BaseEncoding.base16().lowerCase().encode(spanContextBytes));
+  }
+}