解决因为使用了官方xbean-2.4.0.jar 的库造成的性能问题

public final XmlObject set(XmlObject src)
  {
    if (isImmutable()) {
      throw new IllegalStateException("Cannot set the value of an immutable XmlObject");
    }
    XmlObjectBase obj = underlying(src);

    TypeStoreUser newObj = this;

    if (obj == null)
    {
      setNil();
      return this;
    }

    if (obj.isImmutable()) {
      set(obj.stringValue());
    }
    else {
      boolean noSyncThis = preCheck();
      boolean noSyncObj = obj.preCheck();

      if (monitor() == obj.monitor())
      {
        if (noSyncThis) {
          newObj = setterHelper(obj);
        }
        else {
          synchronized (monitor()) {
            newObj = setterHelper(obj);
          }

        }

      }
      else if (noSyncThis)
      {
        if (noSyncObj)
        {
          newObj = setterHelper(obj);
        }
        else
        {
          synchronized (obj.monitor()) {
            newObj = setterHelper(obj);
          }
        }
      }
      else
      {
        if (noSyncObj)
        {
          synchronized (monitor()) {
            newObj = setterHelper(obj);
          }

        }

        boolean acquired = false;
        try
        {
          GlobalLock.acquire();
          acquired = true;

          synchronized (monitor())
          {
            synchronized (obj.monitor())
            {
              GlobalLock.release();
              acquired = false;

              newObj = setterHelper(obj);
            }
          }
        }
        catch (InterruptedException e)
        {
          throw new XmlRuntimeException(e);
        }
        finally
        {
          if (acquired) {
            GlobalLock.release();
          }
        }
      }

    }

    return (XmlObject)newObj;
  }