sort array performance

core-java-collections/src/main/java/com/baeldung/performance/ArraySortBenchmark.java

@@ -0,0 +1,56 @@
+package com.baeldung.performance;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Measurement(batchSize = 100000, iterations = 10)
+@Warmup(batchSize = 100000, iterations = 10)
+public class ArraySortBenchmark {
+
+    @State(Scope.Thread)
+    public static class Initialize {
+
+        String[] array = new String[]{"A", "AB", "B"};
+
+        List<String> list = new ArrayList<>();
+
+        @Setup(Level.Trial)
+        public void setUp() {
+            list.add("A");
+            list.add("AB");
+            list.add("B");
+        }
+
+    }
+
+    @Benchmark
+    public String[] benchmarkArraysSort(ArraySortBenchmark.Initialize state) {
+        Arrays.sort(state.array);
+        return state.array;
+    }
+
+    @Benchmark
+    public List<String> benchmarkCollectionsSort(ArraySortBenchmark.Initialize state) {
+        Collections.sort(state.list);
+        return state.list;
+    }
+
+    public static void main(String[] args) throws Exception {
+        Options options = new OptionsBuilder()
+                .include(ArraySortBenchmark.class.getSimpleName()).threads(1)
+                .forks(1).shouldFailOnError(true)
+                .shouldDoGC(true)
+                .jvmArgs("-server").build();
+        new Runner(options).run();
+    }
+}