Add "Analyzing React Performance" section (enaqx#865)

* Add "Analyzing React Performance" section

I would love include resources about performance improvement and tuning. More and more developers are working on scaling React applications to fit in different conditions like weak Internet connection and PWA. It would be amazing if we can have a list of the topic to help the community.

* add tutorial for Analyzing React Performance 

add "Using the React DevTools Profiler to Diagnose React App Performance Issues" from netlify blog

* add tutorial to Analyzing React Performance

add article "Top 5 Practices to Boost React Performance" from codementor

* add @sw-yx' post

Author: DawChihLiou

README.md

@@ -26,6 +26,7 @@ A collection of awesome things regarding React ecosystem.
     - [Prerendering aka snapshotting](#prerendering-aka-snapshotting)
     - [Compiling React Tutorials](#compiling-react-tutorials)
     - [Debugging React](#debugging-react)
+    - [Analyzing React Performance](#analyzing-react-performance)
     - [Authentication](#authentication)
     - [Authorization](#authorization)
     - [File Uploads](#file-uploads)
@@ -284,6 +285,15 @@ A collection of awesome things regarding React ecosystem.
 * [Reactotron: Control, monitor, and instrument](https://github.com/skellock/reactotron)
 * [React-fix-it: Automagically generate tests from errors](https://github.com/MicheleBertoli/react-fix-it)
 
+##### Analyzing React Performance
+* [Introducing the React Profiler](https://reactjs.org/blog/2018/09/10/introducing-the-react-profiler.html)
+* [Why did you update](https://github.com/maicki/why-did-you-update)
+* [Twitter Lite and High Performance React Progressive Web Apps at Scale](https://medium.com/@paularmstrong/twitter-lite-and-high-performance-react-progressive-web-apps-at-scale-d28a00e780a3)
+* [Using the React DevTools Profiler to Diagnose React App Performance Issues](https://www.netlify.com/blog/2018/08/29/using-the-react-devtools-profiler-to-diagnose-react-app-performance-issues/)
+* [Top 5 Practices to Boost React Performance](https://www.codementor.io/blizzerand/top-5-practices-to-boost-react-performance-jv6zr89ep)
+* [Using the React DevTools Profiler to Diagnose React App Performance Issues](https://www.netlify.com/blog/2018/08/29/using-the-react-devtools-profiler-to-diagnose-react-app-performance-issues/)
+
+
 ##### Authentication
 * [Adding authentication to your React Flux app](https://auth0.com/blog/2015/04/09/adding-authentication-to-your-react-flux-app/)
 * [Build a React Application with User Authentication](https://stormpath.com/blog/build-a-react-app-with-user-authentication/)