克隆 IntervalHistogram
<IntervalHistogram> 实例可以通过 <MessagePort> 克隆。
在接收端,直方图被克隆为没有实现 enable()
和 disable()
方法的普通 <Histogram> 对象。
<IntervalHistogram> instances can be cloned via <MessagePort>. On the receiving
end, the histogram is cloned as a plain <Histogram> object that does not
implement the enable()
and disable()
methods.