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Linhieng committed Mar 30, 2024
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1 change: 1 addition & 0 deletions README.md
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面经/基础网站:

- [web前端面试 - 面试官系列](https://vue3js.cn/interview/)
- [小林 x 图解计算机基础](https://xiaolincoding.com/)
- [大厂面试每日一题](https://q.shanyue.tech/)
- [木易杨前端进阶](https://muyiy.cn/)
- [前端进阶之旅](https://interview.poetries.top/) 付费,但免费的已经够看了
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# 浏览器相关

优秀文章:
- [javascript - 浏览器渲染原理 - 无线前端技术 - SegmentFault 思否](https://segmentfault.com/a/1190000044622503)
- [重排(reflow)和重绘(repaint) - 掘金](https://juejin.cn/post/6844904083212468238)
4 changes: 4 additions & 0 deletions docs/debug.md
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具体可以参考 [vue 的 diff 算法](https://vue3js.cn/interview/vue/diff.html)。里面提供了很多图片说明,更加清晰易懂。

## 一次 canvas 绘制颜色时的性能优化

过去的内容笔试暂时没找到

## 服务器的端口无法访问

- 服务器的端口无法访问。当初查看了安全组,也查看了服务器的防火墙,甚至关闭了防火墙,但最终还是没有效果。无奈之下像阿里云提了一个工单,但和技术人员交流时,就发现原因所在了。原来是我一直配置的安全组,并不是我服务器所属的那个安全组。我的服务器是在深圳,但我配置的安全组却是在北京!
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# 我的一些笔记

## TCP 连接与释放时传递的标记

三报文握手
1. > SYN, seq=x
2. < SYN, ack=x+1, **ACK**, seq = y
3. > ACK, seq=x+1, ack = y+1
四报文握手
1. > FIN, seq=u
2. < ACK, ack=u+1, seq = v
3. < ACK, ack=u+1, **FIN**, seq = w
4. > ACK, seq=u+1, ack = w + 1
## 为什么要三报文握手

*因为客户端发送的第一个报文,可能是无效的!* 在这种情况下,如果服务端没有收到客户端的确认,那么它就知道这是无效报文,从而不会傻傻地继续在那里等待!
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