You can also generate a trace through external tools such as profilers and code-coverage tools.

您还可以通过各种外部工具来生成跟踪，比如探查器和代码覆盖工具。

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In some programs, it is important to examine code closely and use profilers to make sure that it is running as fast as possible.

在另一些程序中，由于在编写时代码运行得足够快，因此不必进行此类优化。

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