如何在 Java 中计时方法的执行?

2022-01-30 00:00:00 timing execution-time java
  1. 如何获取方法的执行时间?
  2. 是否有一个 Timer 实用程序类用于计时任务需要多长时间等?
  1. How do I get a method's execution time?
  2. Is there a Timer utility class for things like timing how long a task takes, etc?

Google 上的大多数搜索都返回了用于安排线程和任务的计时器的结果，这不是我想要的.

Most of the searches on Google return results for timers that schedule threads and tasks, which is not what I want.

推荐答案

老套路总是有的:

long startTime = System.nanoTime();
methodToTime();
long endTime = System.nanoTime();

long duration = (endTime - startTime);  //divide by 1000000 to get milliseconds.

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