### JavaDeserializer#getParamArg 
<img width="515" alt="1" src="https://user-images.githubusercontent.com/6971152/35181255-599cce00-fdf9-11e7-95b4-7d29314161be.png">
for values that between -128 ~ 127 , autoboxing or call valueOf() is more efficient than using consctrutor , and use less memory .

reference blog :
http://blog.csdn.net/qq_27093465/article/details/52473649

ways to change : change to  autoboxing  or  Xxx.valueOf(0);

### below is the change : 
```java
protected static Object getParamArg(Class cl) {
    if (!cl.isPrimitive())
        return null;
    else if (boolean.class.equals(cl))
        return Boolean.FALSE;
    else if (byte.class.equals(cl))
        return 0;
    else if (short.class.equals(cl))
        return 0;
    else if (char.class.equals(cl))
        return 0;
    else if (int.class.equals(cl))
        return 0;
    else if (long.class.equals(cl))
        return 0L;
    else if (float.class.equals(cl))
        return 0F;
    else if (double.class.equals(cl))
        return 0D;
    else
        throw new UnsupportedOperationException();
}
```




cost += 4;
                else if (param[j].isPrimitive())
                    cost += 5;
                else
                    cost += 6;
            }
            if (cost < 0 || cost > (1 << 48))
                cost = 1 << 48;
            cost += (long) param.length << 48;
            if (cost < bestCost) {
                _constructor = constructors[i];
                bestCost = cost;
            }
        }
        if (_constructor != null) {
            _constructor.setAccessible(true);
            Class[] params = _constructor.getParameterTypes();
            _constructorArgs = new Object[params.length];
            for (int i = 0; i < params.length; i++) {
                _constructorArgs[i] = getParamArg(params[i]);
            }
        }
    }
    /**
     * Creates a map of the classes fields.
     */
    protected static Object getParamArg(Class cl) {
        if (!cl.isPrimitive())
            return null;
        else if (boolean.class.equals(cl))