如何在java中对方法执行时间进行基准测试？

public class ManualBenchmark {
    public static void main(String[] args) {
        long startTime = System.nanoTime();
        
        // 要测试的方法
        for (int i = 0; i < 1000000; i++) {
            Math.sqrt(i);
        }
        
        long endTime = System.nanoTime();
        long duration = (endTime - startTime);
        System.out.println("Execution time: " + duration + " ns");
    }
}

<dependency>
    <groupId>org.openjdk.jmh</groupId>
    <artifactId>jmh-core</artifactId>
    <version>1.35</version>
</dependency>
<dependency>
    <groupId>org.openjdk.jmh</groupId>
    <artifactId>jmh-generator-annprocess</artifactId>
    <version>1.35</version>
</dependency>

import org.openjdk.jmh.annotations.*;
import java.util.concurrent.TimeUnit;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
@Fork(1)
@State(Scope.Benchmark)
public class JmhBenchmark {

    @Benchmark
    public void testMethod() {
        for (int i = 0; i < 1000000; i++) {
            Math.sqrt(i);
        }
    }

    public static void main(String[] args) throws Exception {
        org.openjdk.jmh.Main.main(args);
    }
}