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前端项目js压缩成一行性能有很大提升吗?

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对 JS 执行性能没有提升。

但因在网络带宽不变的情况下,因为文件变小了,所以下载所需时间就变短了,这对首屏加载速度有一定提升。


补充:因为 AST 中的词法分析是基于字符流的,所以字符长度对于 AST
本身来说有一定影响(主要在内存占用方面),但对于实际的执行效率上是没有影响的。细节见评论区,感谢 @Fractal 的指出。


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