diff --git a/core-java-modules/core-java-arrays-2/pom.xml b/core-java-modules/core-java-arrays-2/pom.xml index 3f6b7094bb..532f0a6144 100644 --- a/core-java-modules/core-java-arrays-2/pom.xml +++ b/core-java-modules/core-java-arrays-2/pom.xml @@ -19,6 +19,16 @@ org.apache.commons commons-lang3 ${commons-lang3.version} + + + org.openjdk.jmh + jmh-core + ${jmh.version} + + + org.openjdk.jmh + jmh-generator-annprocess + ${jmh.version} @@ -37,9 +47,34 @@ true + + + org.apache.maven.plugins + maven-shade-plugin + 3.2.0 + + + package + + shade + + + benchmarks + + + org.openjdk.jmh.Main + + + + + + + + 1.19 3.9 diff --git a/core-java-modules/core-java-arrays-2/src/main/java/com/baeldung/arraysort/ArraySortingBenchmark.java b/core-java-modules/core-java-arrays-2/src/main/java/com/baeldung/arraysort/ArraySortingBenchmark.java new file mode 100644 index 0000000000..640d729020 --- /dev/null +++ b/core-java-modules/core-java-arrays-2/src/main/java/com/baeldung/arraysort/ArraySortingBenchmark.java @@ -0,0 +1,72 @@ +package com.baeldung.arraysort; + +import java.util.Arrays; +import java.util.Random; +import java.util.concurrent.TimeUnit; + +import org.openjdk.jmh.annotations.Benchmark; +import org.openjdk.jmh.annotations.BenchmarkMode; +import org.openjdk.jmh.annotations.Fork; +import org.openjdk.jmh.annotations.Level; +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.infra.Blackhole; + +@BenchmarkMode(Mode.AverageTime) +@Warmup(iterations = 5) +@Measurement(iterations = 10) +@Fork(2) +@OutputTimeUnit(TimeUnit.MILLISECONDS) +public class ArraySortingBenchmark { + + @State(Scope.Benchmark) + public static class ArrayContainer { + + @Param({ "1000", "10000", "100000", "1000000" }) + int arraySize; + + // initial unsorted array + int[] unsortedArray; + + //cloned array to sort + int[] arrayToSort; + + @Setup(Level.Trial) + public void createUnSortedArray() { + unsortedArray = new int[arraySize]; + for (int i = 0; i < arraySize; i++) { + unsortedArray[i] = new Random().nextInt(1000); + } + } + + @Setup(Level.Invocation) + public void createUnSortedArrayCopy() { + arrayToSort = unsortedArray.clone(); + } + + int[] getArrayToSort() { + return arrayToSort; + } + } + + @Benchmark + public void benchmark_arrays_parallel_sort(ArrayContainer d, Blackhole b) { + int[] arr = d.getArrayToSort(); + Arrays.parallelSort(arr); + b.consume(arr); + } + + @Benchmark + public void benchmark_arrays_sort(ArrayContainer d, Blackhole b) { + int[] arr = d.getArrayToSort(); + Arrays.sort(arr); + b.consume(arr); + } + +}