feat: JMHExample06

multithreading1/src/main/java/cn/bunny/JMHExample06.java

@@ -0,0 +1,50 @@
+package cn.bunny;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@Fork(1)
+@Warmup(iterations = 5)
+@Measurement(iterations = 10)
+@OutputTimeUnit(TimeUnit.MICROSECONDS)
+@Threads(5)
+@State(Scope.Benchmark)
+public class JMHExample06 {
+
+    private Map<Long, Long> concurrentMap;
+    private Map<Long, Long> synchronizedMap;
+
+    public static void main(String[] args) throws RunnerException {
+        Options options = new OptionsBuilder()
+                .include(JMHExample06.class.getSimpleName())
+                .build();
+
+        new Runner(options).run();
+    }
+
+    @Setup
+    public void setUp() {
+        concurrentMap = new ConcurrentHashMap<>();
+        synchronizedMap = Collections.synchronizedMap(new HashMap<>());
+    }
+
+    @Benchmark
+    public void testConcurrencyMap() {
+        concurrentMap.put(System.nanoTime(), System.nanoTime());
+    }
+
+    @Benchmark
+    public void testSynchronizedMap() {
+        synchronizedMap.put(System.nanoTime(), System.nanoTime());
+    }
+}