java - 方法断点可能会大大减慢调试速度

Question

每当向方法声明的行添加断点时(在 Intellij IDEA 或 Android Studio 中)，都会出现一个弹出窗口:

Method breakpoints may dramatically slow down debugging

为什么它会显着减慢调试速度，是我的问题吗？将断点放在函数的第一行有什么不同？

谢谢!

Answer 1

我环顾四周，在 Intellij Documetation 中看到了这篇帖子:

Method Breakpoint

Method breakpoints act in response to the program entering or exiting a particular method. They let you target your debugging sessions by method you wish to investigate, rather than by line number. Method breakpoints let you follow the program flow at the method level as well as check entry and exit conditions. Note that using method breakpoints can slow down the application you are debugging.

我猜它会在程序进入方法之前停止程序，以便您可以在进入方法之前评估参数等。

它显着变慢的原因是(这是我可以收集到的，因为这是我在 Intellij 文档中的方法断点上可以找到的全部)它必须:

let you follow the program flow at the method level as well as check entry and exit conditions

我想这比仅仅停止程序的执行要花更长的时间