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BAEL-4211 Add benchmarks

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asia 2021-09-02 14:26:36 +02:00
parent 7c10329e13
commit bdef2f248d
4 changed files with 179 additions and 27 deletions
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112
core-java-modules/core-java-arrays-operations-advanced/pom.xml
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@ -1,35 +1,93 @@
<?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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-arrays-operations-advanced</artifactId>
<name>core-java-arrays-operations-advanced</name>
<packaging>jar</packaging>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>core-java-arrays-operations-advanced</artifactId>
<name>core-java-arrays-operations-advanced</name>
<packaging>jar</packaging>
<parent>
<artifactId>core-java-modules</artifactId>
<groupId>com.baeldung.core-java-modules</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<parent>
<artifactId>core-java-modules</artifactId>
<groupId>com.baeldung.core-java-modules</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
<properties>
<assertj-core.version>3.10.0</assertj-core.version>
</properties>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${jmh.version}</version>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-generator-annprocess</artifactId>
<version>${jmh.version}</version>
</dependency>
</dependencies>
<properties>
<assertj-core.version>3.10.0</assertj-core.version>
<jmh.version>1.22</jmh.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jmh.version>1.33</jmh.version>
<maven-jar-plugin.version>3.0.2</maven-jar-plugin.version>
<jol-core.version>0.10</jol-core.version>
<maven-assembly-plugin.version>3.2.0</maven-assembly-plugin.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>${maven-jar-plugin.version}</version>
<configuration>
<archive>
<manifest>
<mainClass>com.baeldung.BenchmarkRunner</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>${maven-assembly-plugin.version}</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.baeldung.jmh.BenchmarkRunner</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

10
core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/jmh/BenchmarkRunner.java Normal file
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package com.baeldung.jmh;
public class BenchmarkRunner {
public static void main(String[] args) throws Exception {
org.openjdk.jmh.Main.main(args);
}
}

42
core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/jmh/ObjectsCopyBenchmark.java Normal file
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package com.baeldung.jmh;
import org.openjdk.jmh.annotations.*;
import java.util.Arrays;
import java.util.Random;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.AverageTime)
@State(Scope.Thread)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Warmup(iterations = 10)
@Fork(1)
@Measurement(iterations = 100)
public class ObjectsCopyBenchmark {
@Param({ "10", "1000000" })
public int SIZE;
Integer[] src;
@Setup
public void setup() {
Random r = new Random();
src = new Integer[SIZE];
for (int i = 0; i < SIZE; i++) {
src[i] = r.nextInt();
}
}
@Benchmark
public Integer[] systemArrayCopyBenchmark() {
Integer[] target = new Integer[SIZE];
System.arraycopy(src, 0, target, 0, SIZE);
return target;
}
@Benchmark
public Integer[] arraysCopyOfBenchmark() {
return Arrays.copyOf(src, SIZE);
}
}

42
core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/jmh/PrimitivesCopyBenchmark.java Normal file
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package com.baeldung.jmh;
import org.openjdk.jmh.annotations.*;
import java.util.Arrays;
import java.util.Random;
import java.util.concurrent.TimeUnit;
@BenchmarkMode(Mode.AverageTime)
@State(Scope.Thread)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Warmup(iterations = 10)
@Fork(1)
@Measurement(iterations = 100)
public class PrimitivesCopyBenchmark {
@Param({ "10", "1000000" })
public int SIZE;
int[] src;
@Setup
public void setup() {
Random r = new Random();
src = new int[SIZE];
for (int i = 0; i < SIZE; i++) {
src[i] = r.nextInt();
}
}
@Benchmark
public int[] systemArrayCopyBenchmark() {
int[] target = new int[SIZE];
System.arraycopy(src, 0, target, 0, SIZE);
return target;
}
@Benchmark
public int[] arraysCopyOfBenchmark() {
return Arrays.copyOf(src, SIZE);
}
}