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Dec 22, 2020
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fix typo #49

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2 changes: 1 addition & 1 deletion _2020/debugging-profiling.md
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Expand Up @@ -256,7 +256,7 @@ CPU 性能分析工具有两种： 追踪分析器（_tracing_）及采样分析
追踪分析器 会记录程序的每一次函数调用，而采样分析器则只会周期性的监测（通常为每毫秒）您的程序并记录程序堆栈。它们使用这些记录来生成统计信息，显示程序在哪些事情上花费了最多的时间。如果您希望了解更多相关信息，可以参考[这篇](https://jvns.ca/blog/2017/12/17/how-do-ruby---python-profilers-work-) 介绍性的文章。


大多数的编程语言都有一些基于命令行都分析器，我们可以使用它们来分析代码。它们通常可以集成在 IDE 中，但是本节课我们会专注于这些命令行工具本身。
大多数的编程语言都有一些基于命令行的分析器，我们可以使用它们来分析代码。它们通常可以集成在 IDE 中，但是本节课我们会专注于这些命令行工具本身。

在 Python 中，我们使用 `cProfile` 模块来分析每次函数调用所消耗都时间。 在下面的例子中，我们实现了一个基础的 grep 命令：

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