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rohitchaudhary2023maibin
rohitchaudhary2023
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maibin
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BAEL-3380 (eugenp#8454)
* initial commit * changes for articlesBAEL-3380 * Removed evaluation article files * BAEL-3380 * adding test case BAEL-3380 * BAEL-3380 * BAEL-3380 - updated tests and removed main class * BAEL-3380 - Updated Test class name * BAEL-3380 - Updated Test class name * BAEL-3380 - Updated testcase names as per BDD naming convention * BAEL 3380 - Added JMH benchmark
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‎core-java-modules/core-java-arrays-2/pom.xml‎

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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<version>${commons-lang3.version}</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-core</artifactId>
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<version>${jmh.version}</version>
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</dependency>
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<dependency>
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<groupId>org.openjdk.jmh</groupId>
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>${jmh.version}</version>
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</dependency>
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<!-- test scoped -->
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<dependency>
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<filtering>true</filtering>
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</resource>
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</resources>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.0</version>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<finalName>benchmarks</finalName>
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<transformers>
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<transformer
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implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<mainClass>org.openjdk.jmh.Main</mainClass>
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</transformer>
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</transformers>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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<properties>
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<jmh.version>1.19</jmh.version>
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<!-- util -->
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<commons-lang3.version>3.9</commons-lang3.version>
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<!-- testing -->

‎core-java-modules/core-java-arrays-2/src/main/java/com/baeldung/arraysort/ArraySortingBenchmark.java‎

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package com.baeldung.arraysort;
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import java.util.Arrays;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Level;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Warmup;
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import org.openjdk.jmh.infra.Blackhole;
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@BenchmarkMode(Mode.AverageTime)
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@Warmup(iterations = 5)
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@Measurement(iterations = 10)
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@Fork(2)
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@OutputTimeUnit(TimeUnit.MILLISECONDS)
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public class ArraySortingBenchmark {
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@State(Scope.Benchmark)
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public static class ArrayContainer {
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@Param({ "1000", "10000", "100000", "1000000" })
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int arraySize;
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// initial unsorted array
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int[] unsortedArray;
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//cloned array to sort
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int[] arrayToSort;
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@Setup(Level.Trial)
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public void createUnSortedArray() {
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unsortedArray = new int[arraySize];
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for (int i = 0; i < arraySize; i++) {
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unsortedArray[i] = new Random().nextInt(1000);
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}
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}
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@Setup(Level.Invocation)
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public void createUnSortedArrayCopy() {
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arrayToSort = unsortedArray.clone();
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}
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int[] getArrayToSort() {
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return arrayToSort;
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}
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}
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@Benchmark
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public void benchmark_arrays_parallel_sort(ArrayContainer d, Blackhole b) {
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int[] arr = d.getArrayToSort();
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Arrays.parallelSort(arr);
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b.consume(arr);
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}
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@Benchmark
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public void benchmark_arrays_sort(ArrayContainer d, Blackhole b) {
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int[] arr = d.getArrayToSort();
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Arrays.sort(arr);
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b.consume(arr);
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}
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}

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