类：SlowBuffer

🌐 Class: SlowBuffer

参见 Buffer.allocUnsafeSlow()。这从来不是一个类，因为构造函数总是返回一个 Buffer 实例，而不是 SlowBuffer 实例。

🌐 See Buffer.allocUnsafeSlow(). This was never a class in the sense that the constructor always returned a Buffer instance, rather than a SlowBuffer instance.