为啥我的代码synchronized锁直接从无锁跳到了轻量级锁

Question

从图片中 对象头从 001到000再到001，从无锁跳到了轻量级锁，只有一个线程访问锁的话不是先变成偏向锁的吗？

public class SynchronizedLockInfoTest {

    private static Object object = new Object();




    public static void main(String[] args) {


        System.out.println(object.toString());

        SynchronizedLockInfoTest synchronizedLockInfoTest = new SynchronizedLockInfoTest();

        Thread1 thread1 = synchronizedLockInfoTest.new Thread1();
        thread1.start();


    }


    public class Thread1 extends  Thread{
        @Override
        public void run() {

            Thread thread = Thread.currentThread();
            System.out.println(1);
            System.out.println(thread.getName() + ClassLayout.parseInstance(object).toPrintable());
            synchronized (object){
                System.out.println(2);
                System.out.println(thread.getName() + ClassLayout.parseInstance(object).toPrintable());
            }
            System.out.println(3);
            System.out.println(thread.getName() + ClassLayout.parseInstance(object).toPrintable());

        }
    }

}