问题描述
我正在接收 XML，需要转换为原始数组或 ArrayList.在内存和垃圾收集方面的性能有很大差异吗?我的应用程序每秒将创建数千个这样的对象，我需要尽量减少 GC，因为我需要实时性能.
I am receiving XML and need to convert to either a primitive Array or ArrayList.Is there much difference in terms of performance in terms of memory and garbage collection?My application will be creating thousand of these objects every second and I need to minimize GC as I need real-time performance.
谢谢
推荐答案
原始数组效率更高，因为它们不需要包装对象.Guava 具有由原始数组支持的 List 实现(例如:Ints.asList(int[]))，也许这对您来说可能是一个合理的解决方案:获得集合的强大功能，但仅在您真正需要它们时才使用对象.
Primitive arrays are much more efficient, as they don't require wrapper objects. Guava has List implementations that are backed by primitive arrays (example: Ints.asList(int[])), perhaps that could be a reasonable solution for you: get the power of a collection but only use Objects when you actually need them.
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