Front-end interview speech collection Part 8: High-frequency test points (JS performance optimization & performance optimization trivial matters)

This is for the record 前端面试的话术集锦第八篇博文——高频考点（JS性能优化 & 性能优化琐碎事）and I will keep updating this blog post. ❗❗❗

1. Look at JS performance optimization from V8

Note: This knowledge point belongs to the field of performance optimization.

1.1 Test Performance Tools

ChromeA large and comprehensive performance testing tool has been provided Audits.

After we click Audits, you can see the following interface:

In this interface, we can select the function we want to test and click it Run audits. The tool will automatically run to help us test the problem and give a complete report:

The picture above is a report given after testing the performance of the gold mining home page. You can see that 性能、 体验、SEOscores are given for each in the report, and each indicator has a detailed evaluation.

After the evaluation &