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### Have you read the documentation?
- [X] Yes, I've read the [how to make a reproducable bug guide](https://www.sitespeed.io/documentation/sitespeed.io/bug-report/)
- [X] Yes, I've read the [how to …
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Back to the Largest Contentful Paint (LCP) issue in Google PageSpeed Insights on mobile devices.
Just a reminder: Starting in May 2021, Core Web Vitals will become key search ranking factors.
I as…
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# 테스트
## 1. 유닛테스트 vs 통합테스트 vs E2E테스트를 비교하여 설명해주세요
### 1. 유닛테스트
Unit 테스트는 전체 코드 중 작은 부분을 테스트하는 것이다. (ex. 함수 하나하나 개별로 테스트 코드를 작성)
만약 테스트에 네트워크나 DB같은 외부 리소스가 포함된다면, 이는 유닛 테스트가 아니다.
- 기본적으로 테스트를 위한…
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## 一、为什么要做性能优化?
web的性能一定程度上影响了用户留存率,同样一个网页,在pc端上因为有良好的硬件支持性能较好,而在移动端上时可能会出现诸如页面卡顿、页面加载时间过长等影响用户体验性的问题;这些问题需要我们针对当前网页进行性能分析,找出性能瓶颈或者可以进一步优化的地方
## 二、应该优化哪些地方?
1、做过移动端h5的前端可能会遇到这个场景:
产品经理、测试或者用户等使用…
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### Steps to reproduce the problem
1. Open any user profile like https://mastodon.online/@pkrugman while logged out
...
### Expected behaviour
The page should finish loading within a reaso…
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### FAQ
- [X] Yes, my issue is not about [variability](https://github.com/GoogleChrome/lighthouse/blob/main/docs/variability.md) or [throttling](https://github.com/GoogleChrome/lighthouse/blob/main/d…
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### 前端性能优化
>
> ssr 篇
```js
一个通常的ssr项目 可以通过 LightHouse 在低网速情况下 去分析 跑分:
一般ssr 项目 可以解决spa项目的
fcp(First Contentful Paint) : 首屏渲染
lcp(Largest Contentful Paint): 最大内容绘制,是用来测量加载的性能:
阻塞lcp 的原因有:…
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First of all, thanks @nucliweb for sharing and the great work! 😍
Would it make sense to have a file ready to be imported in DevTools? I found this: https://levelup.gitconnected.com/snippets-in-goo…
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#### Describe the feature
Currently it's not possible to send an early-hints response (103 Early Hints (RFC 8297)) using the RoutingContext.
#### Use cases
Early hints is useful to instruct t…
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We are using off the shelf docusaurus site. Very little effort has been made to tune SEO or to evaluate analytics data. (The site is instrumented to gather Google Analytics data)
We would appreci…