了解 Java 序列化

我正在尝试比较标准的 Java 反序列化。并询问这是否是正确的方法。我写了以下课程：

//{"first", 1234.1234, 21341234, 234123412341234124L, "fifth"}
public class ArrayInputStreamStub extends InputStream{
    public int[] arr = new int[260];
    private int reader = 0;

    public ArrayInputStreamStub(){
        reader[0] = -84;
        //...
    }

    @Override
    public int read() throws IOException {
        return arr[reader++];
    }

    public void reset() {
        reader = 0;
    }
}

我有相同的 HashMap 存根。

//{("first", 1), ("second", 2), ("third", 3), ("fourth", 4), ("fifth", 5)}
public class HashMapInputStreamStub extends InputStream{
    //...
}

现在我的基准如下所示：

public InputStreamStub is;
public ArrayInputStreamStub ais;

@Setup
public void setup(){
    is = new InputStreamStub();
    ais = new ArrayInputStreamStub();
}

@Benchmark
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@BenchmarkMode(Mode.AverageTime)
public void measureDeserializeHashMap(Blackhole bh){
    try {
        ObjectInputStream ois = new ObjectInputStream(is);
        Map<String, Integer> schema = (Map<String, Integer>) ois.readObject();
        is.reset();
        bh.consume(schema);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

@Benchmark
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@BenchmarkMode(Mode.AverageTime)
public void measureDeserializeArray(Blackhole bh){
    try {
        ObjectInputStream ois = new ObjectInputStream(ais);
        Object[] array = (Object[]) ois.readObject();
        ais.reset();
        bh.consume(array);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

我得到的结果如下：

Benchmark                              Mode  Cnt   Score   Error  Units
MyBenchmark.measureDeserializeArray    avgt    5  15.940 ± 0.044  us/op
MyBenchmark.measureDeserializeHashMap  avgt    5  12.118 ± 0.057  us/op

接下来的时间只需约 10 微秒。我跑了-prof gc，结果几乎一样。

问题是这个测量正确吗？这些简单对象的序列化大约需要 10 微秒？