问题描述
接口对于方法 of（）有两个重载。其中一个是变量arity方法，而另一个是一个参数。
The Stream interface has two overloads for the method of(). One of these is a variable-arity method while the other takes a single argument.
单参数方法是一个性能优化而不是将一个参数传递给变量arity方法？如果是这样，它如何提高性能？可以询问 empty（）方法的相同问题，这似乎是围绕变量arity of（）。
Is the single-argument method a performance optimization versus passing one argument to the variable-arity method? If so, how does it improve performance? The same questions could be asked of the empty() method, which would seem to be syntax sugar around the variable-arity of().
我看到这些方法的实现有所不同，显然差别在于 Spliterator 被实例化;但这对 Stream API有什么好处？
I see that the implementation differs between these methods, with the difference apparently being how the Spliterator is instantiated; but what advantage does this offer to the Stream API?
推荐答案
是，这是一个优化，以避免创建一个数组只包含一个元素的开销，这是你使用varargs版本时得到的。
Yes, it's an optimization to avoid the overhead of creating an array to hold only a single element, which is what you'd get if you used the varargs version.
你在看什么实现版本？当我看到实现时，我没有看到这一点。
What implementation version are you looking at? When I look at the implementation I don't see this.
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