bring back dependencies

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

@@ -1,6 +1,9 @@
 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.HashSet;
@@ -15,14 +18,14 @@ public class CollectionsBenchmark {
         private Set<Employee> employeeSet = new HashSet<>();
         private List<Employee> employeeList = new ArrayList<>();
 
-        private final long m_count = 16;
+        private long iterations = 10000;
 
         private Employee employee = new Employee(100L, "Harry");
 
-        @Setup(Level.Invocation)
+        @Setup(Level.Trial)
         public void setUp() {
 
-            for (long ii = 0; ii < m_count; ii++) {
+            for (long ii = 0; ii < iterations; ii++) {
                 employeeSet.add(new Employee(ii, "John"));
                 employeeList.add(new Employee(ii, "John"));
 
@@ -35,19 +38,26 @@ public class CollectionsBenchmark {
 
     @Benchmark
     @BenchmarkMode(Mode.AverageTime)
-    @OutputTimeUnit(TimeUnit.MINUTES)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    @Warmup(iterations = 1)
     public boolean testArrayList(MyState state) {
         return state.employeeList.contains(state.employee);
     }
 
     @Benchmark
     @BenchmarkMode(Mode.AverageTime)
-    @OutputTimeUnit(TimeUnit.MINUTES)
+    @OutputTimeUnit(TimeUnit.NANOSECONDS)
+    @Warmup(iterations = 1)
     public boolean testHashSet(MyState state) {
         return state.employeeSet.contains(state.employee);
     }
 
     public static void main(String[] args) throws Exception {
-        org.openjdk.jmh.Main.main(args);
+        Options options = new OptionsBuilder()
+                .include(CollectionsBenchmark.class.getSimpleName()).threads(1)
+                .forks(1).shouldFailOnError(true)
+                .shouldDoGC(true)
+                .jvmArgs("-server").build();
+        new Runner(options).run();
     }
 }