JMH (#2222)

* JMH

* JMH

jmh/src/main/java/com/baeldung/Application.java

@@ -1,14 +0,0 @@
-package com.baeldung;
-
-import java.io.IOException;
-
-import org.openjdk.jmh.Main;
-import org.openjdk.jmh.runner.RunnerException;
-
-public class Application {
-
-	public static void main(String[] args) throws RunnerException, IOException {
-		Main.main(args);
-	}
-
-}

jmh/src/main/java/com/baeldung/BenchMark.java

@@ -1,12 +1,48 @@
 package com.baeldung;
 
-import org.openjdk.jmh.annotations.Benchmark;
+import com.google.common.hash.HashFunction;
+import com.google.common.hash.Hasher;
+import com.google.common.hash.Hashing;
+import org.openjdk.jmh.annotations.*;
+
+import java.nio.charset.Charset;
 
 public class BenchMark {
 
-	@Benchmark
-	public void init() {
-		
-	}
+    @State(Scope.Benchmark)
+    public static class ExecutionPlan {
+
+        @Param({ "100", "200", "300", "500", "1000" })
+        public int iterations;
+
+        public Hasher murmur3;
+
+        public String password = "4v3rys3kur3p455w0rd";
+
+        @Setup(Level.Invocation)
+        public void setUp() {
+            murmur3 = Hashing.murmur3_128().newHasher();
+        }
+    }
+
+    @Fork(value = 1, warmups = 1)
+    @Benchmark
+    @BenchmarkMode(Mode.Throughput)
+    @Warmup(iterations = 5)
+    public void benchMurmur3_128(ExecutionPlan plan) {
+
+        for (int i = plan.iterations; i > 0; i--) {
+            plan.murmur3.putString(plan.password, Charset.defaultCharset());
+        }
+
+        plan.murmur3.hash();
+    }
+
+    @Benchmark
+    @Fork(value = 1, warmups = 1)
+    @BenchmarkMode(Mode.Throughput)
+    public void init() {
+        // Do nothing
+    }
 
 }

jmh/src/main/java/com/baeldung/BenchmarkRunner.java

@@ -0,0 +1,9 @@
+package com.baeldung;
+
+public class BenchmarkRunner {
+
+    public static void main(String[] args) throws Exception {
+        org.openjdk.jmh.Main.main(args);
+    }
+
+}

jmh/src/test/java/com/baeldung/AppTest.java

@@ -1,38 +0,0 @@
-package com.baeldung;
-
-import junit.framework.Test;
-import junit.framework.TestCase;
-import junit.framework.TestSuite;
-
-/**
- * Unit test for simple App.
- */
-public class AppTest 
-    extends TestCase
-{
-    /**
-     * Create the test case
-     *
-     * @param testName name of the test case
-     */
-    public AppTest( String testName )
-    {
-        super( testName );
-    }
-
-    /**
-     * @return the suite of tests being tested
-     */
-    public static Test suite()
-    {
-        return new TestSuite( AppTest.class );
-    }
-
-    /**
-     * Rigourous Test :-)
-     */
-    public void testApp()
-    {
-        assertTrue( true );
-    }
-}