feat: JMHExample12

multithreading1/src/main/java/cn/bunny/jmh/JMHExample12.java

@@ -0,0 +1,72 @@
+package cn.bunny.jmh;
+
+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.concurrent.TimeUnit;
+
+@BenchmarkMode(Mode.AverageTime)
+@Fork(0)
+@Warmup(iterations = 5)
+@Measurement(iterations = 5)
+@OutputTimeUnit(TimeUnit.MICROSECONDS)
+@State(Scope.Thread)
+public class JMHExample12 {
+    private final Inc inc1 = new Inc1();
+    private final Inc inc2 = new Inc2();
+
+    public static void main(String[] args) throws RunnerException {
+        final Options options = new OptionsBuilder()
+                .include(JMHExample12.class.getSimpleName())
+                .build();
+        new Runner(options).run();
+    }
+
+    private int measure(Inc inc) {
+        int result = 0;
+        for (int i = 0; i < 10; i++) {
+            result += inc.inc();
+        }
+        return result;
+    }
+
+    @Benchmark
+    public int measure_inc_1() {
+        return this.measure(inc1);
+    }
+
+    @Benchmark
+    public int measure_inc_2() {
+        return this.measure(inc2);
+    }
+
+    @Benchmark
+    public int measure_inc_3() {
+        return this.measure(inc1);
+    }
+
+    interface Inc {
+        int inc();
+    }
+
+    public static class Inc1 implements Inc {
+        private int i = 0;
+
+        @Override
+        public int inc() {
+            return ++i;
+        }
+    }
+
+    public static class Inc2 implements Inc {
+        private int i = 0;
+
+        @Override
+        public int inc() {
+            return ++i;
+        }
+    }
+}