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currentTimeMillis

currentTimeMillis

currentTimeMillis

currentTimeMillis

1

But your benchmarking code must handle the possibility that it does no better than System. currentTimeMillis.

但是，它可能并不比 System.currentTimeMillis 好，基准测试代码必须处理这种可能性。

2

In contrast , System. currentTimeMillis merely involves reading a global variable , so it executes extremely quickly, in nanoseconds .

相反，System.currentTimeMillis 只需要读取一个全局变量，所以执行得非常快，是纳秒级的。

3

A final issue with System. currentTimeMillis that affects even long-running tasks is that it is supposed to reflect "wall-clock " time .

currentTimeMillis 的最后一个问题是，假设它反映 “墙上时钟 ”的时间，这个问题甚至会影响长时间运行的任务。

4

In reality , System. currentTimeMillis can have ~10-100 times worse resolution . Its Javadocs state

在真实环境中，System.currentTimeMillis 的分辨率可能会糟糕 ~10-100 倍。

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