docs: add perf intro for hlchunk

Author: shellRaining

README.md

@@ -6,14 +6,27 @@
 <p align='center'>
 <b>English</b> | <a href="./README.zh-CN.md">简体中文</a>
 </p>
+## What can this plugin do
 
-## notice!!!
+Similar to [indent-blankline](https://github.com/lukas-reineke/indent-blankline.nvim), this plugin can highlight the indent line, and highlight the code chunk according to the current cursor position.
 
-There have been many recent changes. If you encounter any bugs, please feel free to raise an issue. I will improve the code clarity and documentation in the future.
+## plugin performance
 
-## What can this plugin do
+Using `profile.nvim` for performance analysis, all experiments were conducted on macOS with alacritty, Neovim window height was 66 lines, the code file was `typescript.js`, starting from the first line to the five hundredth line. The average rendering time per render was `0.7ms`.
 
-Similar to [indent-blankline](https://github.com/lukas-reineke/indent-blankline.nvim), this plugin can highlight the indent line, and highlight the code chunk according to the current cursor position.
+I did a lot of work to minimize rendering time as much as possible
+
+1. Asynchronous rendering to reduce stuttering
+
+2. Using C functions to speed up some function calls
+
+3. Caching extmarks for each line as much as possible to reduce indentation calculations
+
+4. Using throttle functions to batch the rendering process as much as possible
+
+If you want to reduce the sudden stuttering when scrolling the window, maybe you will like `hlchunk.nvim`~
+
+For detailed optimization work, you can see my blog (written in Chinese): [https://www.shellraining.top/docs/tools/hlchunk/profile.html](https://www.shellraining.top/docs/tools/hlchunk/profile.html)
 
 ## Brief introduction
 

README.zh-CN.md

@@ -6,14 +6,24 @@
 <p align='center'>
 <a href="./README.md">English</a> | <b>简体中文</b>
 </p>
+## 这个插件可以做什么
 
-## 注意！！！
+和 [indent-blankline.nvim](https://github.com/lukas-reineke/indent-blankline.nvim) 类似，这个插件可以用来高亮缩进线,并且还可以根据当前光标所处的位置，高亮所在代码块.
 
-最近代码发生了很多变动。如果您遇到任何 bug，请随时提出 issue。我将在未来改进代码清晰度和文档。
+## 插件性能
 
-## 这个插件可以做什么
+使用 `profile.nvim` 进行性能分析，所有实验均是在 macOS 上的 alacritty 进行，Neovim 窗口高度为 66 行，代码文件是 `typescript.js`，从首行开始，到五百行结束。平均每次渲染耗时 `0.7ms`
 
-和 [indent-blankline.nvim](https://github.com/lukas-reineke/indent-blankline.nvim) 类似，这个插件可以用来高亮缩进线,并且还可以根据当前光标所处的位置，高亮所在代码块.
+我做了很多工作来尽可能缩短渲染耗时
+
+1. 异步渲染，减少卡顿
+2. 使用 c 函数，加快部分函数调用
+3. 尽可能缓存每行的 extmark，减少缩进计算
+4. 使用节流函数来尽可能批处理渲染过程
+
+如果你希望能够减少滚动窗口时候突如其来的卡顿感，也许你会喜欢上 `hlchunk.nvim`~
+
+具体的优化工作你可以看我的博客 [https://www.shellraining.top/docs/tools/hlchunk/profile.html](https://www.shellraining.top/docs/tools/hlchunk/profile.html)
 
 ## 简要概述