如何查看执行过程中Java程序中每个方法所花费的时间 [英] How to see time taken by each method in Java program during execution

问题描述

我正在尝试查找Java程序在执行时调用每种方法所花费的时间.我不想用System.currentTimeMillis()乱扔我的代码.也许像探查器或IDE插件之类的东西，但是我不确定这是否叫它.有人可以通过指示我正确的方向来帮助我吗?

I am trying to find the time taken by each method that my Java program calls, while executing. I do not want to litter my code with System.currentTimeMillis(). Maybe, something like a profiler or an IDE plugin, but I am not sure if that is what it is called. Can someone help me by pointing me in the right direction?

示例代码:

public static void main(String[] args){
   Obj A = new Obj();
   ObjDiff B = new ObjDiff();
   A.callMe();
   B.callMeToo();
}

工具/框架:

• Eclipse
• 支柱

我想要的:

1. 实例化Obj A所需的时间，
2. 实例化ObjDiff B所需的时间，
3. 运行A.callMe()所需的时间，
4. 运行B.callMeToo()
所需的时间

1. Time taken to instantiate Obj A,
2. Time taken to instantiate ObjDiff B,
3. Time taken to run A.callMe(),
4. Time taken to run B.callMeToo()

任何帮助将不胜感激.

干杯，
罗希特(Rohitesh)

Cheers,
Rohitesh

编辑:
我已经安装了VisualVM，并将其用作独立应用程序.这很有帮助.但是，我的主要关注仍未得到解决.我无法查看方法上的内存/CPU使用情况.有什么想法吗?

EDIT :
I have installed VisualVM and used it as a standalone app. It has been helpful. However, my primary concern is still not addressed. I cannot look at the memory/CPU usage, method wise. Any thoughts on this?

推荐答案

我也建议 VisualVM ，基本但非常有用.建议您在与应用顶部相同的Java 7 JVM上运行它，以避免兼容性问题.如果需要更高级的功能(例如跟踪与Web服务器的用户交互)，则可以查看更详细的分析器，例如Introscope.

I would recommend VisualVM too, basic but quite useful. Recommended you run it on the same Java 7 JVM as your app top avoid compatibility issues. If you need more advanced features like tracing a user interaction with a web server, you can look at more elaborate profilers like Introscope.

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