1
<dependency>
2
            <groupId>org.openjdk.jmh</groupId>
3
            <artifactId>jmh-core</artifactId>
4
            <version>1.21</version>
5
</dependency>
6
<dependency>
7
    <groupId>org.openjdk.jmh</groupId>
8
    <artifactId>jmh-generator-annprocess</artifactId>
9
    <version>1.21</version>
10
    <scope>provided</scope>
11
</dependency>

1
@BenchmarkMode(Mode.Throughput)
2
@Warmup(iterations = 3)
3
@Measurement(iterations = 20, time = 5, timeUnit = TimeUnit.SECONDS)
4
@Threads(1)
5
@Fork(2)
6
@OutputTimeUnit(TimeUnit.MILLISECONDS)
7
public class BigLoopBenchmark {
8

9
    @Benchmark
10
    public void testBigLoopOutSide() {
11
        long k = 0;
12
        for (int j = 0; j < 1000000000; j++) {
13
            for (int i = 0; i < 100; i++) {
14
                k++;
15
            }
16
        }
17
        use(k);
18
    }
19

20
    @Benchmark
21
    public void testBigLoopInSide() {
22
        long k = 0;
23
        for (int i = 0; i < 100; i++) {
24
            for (int j = 0; j < 1000000000; j++) {
25
                k++;
26
            }
27
        }
28
        use(k);
29
    }
30
    void use(long k){
31

32
    }
33
    public static void main(String[] args) throws RunnerException {
34
        Options options = new OptionsBuilder()
35
                .include(BigLoopBenchmark.class.getSimpleName())
36
                .output("D:/Benchmark.log")
37
                .build();
38
        new Runner(options).run();
39
    }
40
}