删除注释会提高代码性能吗?JavaScript [英] Does removing comments improve code performance? JavaScript

问题描述

从 JavaScript 代码中删除注释会提高性能吗?

Does removing comments from JavaScript code improve performance?

我意识到这不是很好的编程实践，因为注释是开发的内在组成部分.我只是想知道它们是否确实在编译过程中增加了一些开销.

I realize that this is not great programing practice as comments form an intrinsic part of development. I am just interested to know if they do in fact add some overhead during compilation.

推荐答案

无论是编译还是解释 JavaScript，编译器/解释器都需要查看该行，确定它是注释，然后继续(或查看某个区域)行).对于 Web 应用程序，还需要下载注释行.

Whether your compiling or interpreting your JavaScript, the compiler/interpreter needs to look at the line, decide it's a comment, and move on (or look at a region of the line). For web applications, the comment lines also need to be downloaded.

所以是的，有一些开销.

但是，我怀疑您能否找到一个真实的场景，其中差异很重要.

However, I doubt you could find a real-world scenario where that difference matters.

如果您正在编译代码，则开销仅在编译运行期间，而不是在后续执行期间.

If you are compiling your code, the overhead is only during the compile run, not during subsequent execution.

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