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Jira BAEL-4211 (#11193) 

* Init

* Removing mvnw files

* Apply eclipse code format

* Refactoring

* Refactoring

* BAEL-4211 Add benchmarks

* Delete hexagonal directory

* Refactoring based on the feedback

* Refactoring based on feedback - package rename

* Directory rename

Co-authored-by: asia <joannakrzeklubowiecka@protonmail.com>
This commit is contained in:
JoannaaKL 2021-09-14 03:01:26 +02:00 committed by GitHub
parent 141a837679
commit 6a638120dc
4 changed files with 136 additions and 0 deletions
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40
core-java-modules/core-java-arrays-operations-advanced/pom.xml
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@ -26,10 +26,50 @@
<version>${assertj-core.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.openjdk.jmh</groupId>
<artifactId>jmh-core</artifactId>
<version>${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>1.33</jmh.version>
</properties>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.baeldung.copyarraymethodsperformance.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>

11
core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/BenchmarkRunner.java Normal file
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@ -0,0 +1,11 @@
package com.baeldung.copyarraymethodsperformance;
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/copyarraymethodsperformance/ObjectsCopyBenchmark.java Normal file
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@ -0,0 +1,42 @@
package com.baeldung.copyarraymethodsperformance;
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);
}
}

43
core-java-modules/core-java-arrays-operations-advanced/src/main/java/com/baeldung/copyarraymethodsperformance/PrimitivesCopyBenchmark.java Normal file
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@ -0,0 +1,43 @@
package com.baeldung.copyarraymethodsperformance;
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);
}
}