定时器与 setTimeout [英] Timer vs setTimeout

问题描述

flash.utils.setTimeout() 状态的文档:

The docs for flash.utils.setTimeout() state:

不要使用这种方法，请考虑创建一个 Timer 对象，使用指定的间隔，使用 1 作为repeatCount 参数(设置定时器只运行一次).

Instead of using this method, consider creating a Timer object, with the specified interval, using 1 as the repeatCount parameter (which sets the timer to run only once).

有谁知道这样做是否有(显着)优势?当您只需要延迟 1 个调用时，使用 setTimeout 会容易得多.

Does anyone know if there is a (significant) advantage in doing so? Using setTimeout is a lot easier when you only need to delay 1 call.

推荐答案

setTimeout 实际上使用了一个 Timer 子类，SetIntervalTimer，它是一个内部类.您可以通过执行 setTimeout(function ():void { throw "booom"; }, 1); 来检查.您将在堆栈跟踪中看到它.

setTimeout actually uses a Timer subclass, the SetIntervalTimer, which is an internal class. You can check by doing setTimeout(function ():void { throw "booom"; }, 1);. You'll see it in the stack trace.

因此，我真的看不出有什么大的缺点.唯一的区别是，您有 2 个匿名电话而不是一个.OTOH，在性能关键的情况下，您不应该使用任何一个(一个内部计时器除外)以避免 TimerEvent 对象的频繁实例化.

As such, I cannot really see a big disadvantage. The only difference is, that you have 2 anonymous calls instead of one. OTOH, in performance critical situations, you shouldn't be using either (except one internal timer) to avoid frequent instantiation of TimerEvent objects.

基本上，我认为这是一个品味问题.Adobe 决定，AS3 事件系统是令人兴奋的，所以他们推广了它.

Basically, I think it's a matter of taste. Adobe decided, the AS3 event system is the shizzle, so they promote it.

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