added benchmark tests for set and list performance

core-java-collections/pom.xml

@@ -47,26 +47,26 @@
             <version>${eclipse.collections.version}</version>
         </dependency>
         <dependency>
-            <groupId>org.assertj</groupId>
+            <groupId>org.openjdk.jmh</groupId>
-            <artifactId>assertj-core</artifactId>
+            <artifactId>jmh-core</artifactId>
-            <version>${assertj.version}</version>
+            <version>${openjdk.jmh.version}</version>
-            <scope>test</scope>
         </dependency>
         <dependency>
-            <groupId>org.junit.platform</groupId>
+            <groupId>org.openjdk.jmh</groupId>
-            <artifactId>junit-platform-runner</artifactId>
+            <artifactId>jmh-generator-annprocess</artifactId>
-            <version>${junit.platform.version}</version>
+            <version>${openjdk.jmh.version}</version>
-            <scope>test</scope>
         </dependency>
     </dependencies>
 
+
     <properties>
+        <openjdk.jmh.version>1.19</openjdk.jmh.version>
         <junit.platform.version>1.2.0</junit.platform.version>
         <commons-lang3.version>3.5</commons-lang3.version>
         <commons-collections4.version>4.1</commons-collections4.version>
         <collections-generic.version>4.01</collections-generic.version>
         <avaitility.version>1.7.0</avaitility.version>
         <assertj.version>3.6.1</assertj.version>
-        <eclipse.collections.version>9.2.0</eclipse.collections.version>
+        <eclipse.collections.version>7.1.0</eclipse.collections.version>
     </properties>
 </project>

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

@@ -0,0 +1,53 @@
+package com.baeldung.performance;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+public class CollectionsBenchmark {
+
+    @State(Scope.Thread)
+    public static class MyState {
+        private Set<Employee> employeeSet = new HashSet<>();
+        private List<Employee> employeeList = new ArrayList<>();
+
+        private final long m_count = 16;
+
+        private Employee employee = new Employee(100L, "Harry");
+
+        @Setup(Level.Invocation)
+        public void setUp() {
+
+            for (long ii = 0; ii < m_count; ii++) {
+                employeeSet.add(new Employee(ii, "John"));
+                employeeList.add(new Employee(ii, "John"));
+
+                employeeList.add(employee);
+                employeeSet.add(employee);
+            }
+        }
+    }
+
+
+    @Benchmark
+    @BenchmarkMode(Mode.AverageTime)
+    @OutputTimeUnit(TimeUnit.MINUTES)
+    public boolean testArrayList(MyState state) {
+        return state.employeeList.contains(state.employee);
+    }
+
+    @Benchmark
+    @BenchmarkMode(Mode.AverageTime)
+    @OutputTimeUnit(TimeUnit.MINUTES)
+    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);
+    }
+}

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

@@ -0,0 +1,31 @@
+package com.baeldung.performance;
+
+public class Employee {
+
+    private Long id;
+    private String name;
+
+    public Employee(Long id, String name) {
+        this.name = name;
+        this.id = id;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        Employee employee = (Employee) o;
+
+        if (!id.equals(employee.id)) return false;
+        return name.equals(employee.name);
+
+    }
+
+    @Override
+    public int hashCode() {
+        int result = id.hashCode();
+        result = 31 * result + name.hashCode();
+        return result;
+    }
+}