Add benchmarking tutorial (#8698)

* Add benchmarking tutorial

I've written what I hope is the simplest introduction to benchmarking React components. It's meant to be straightforward and easy to follow for beginners. If you agree that it would be helpful, I'd like to add it to the docs.
Would also welcome any and all feedback.

* Just put links together

docs/addons-perf.md

@@ -23,10 +23,11 @@ React is usually quite fast out of the box. However, in situations where you nee
 
 In addition to giving you an overview of your app's overall performance, `Perf` is a profiling tool that tells you exactly where you need to put these hooks.
 
-See these articles by the [Benchling Engineering Team](http://benchling.engineering) for a in-depth introduction to performance tooling:
+See these articles for an introduction to React performance tooling:
 
+ - ["How to Benchmark React Components"](https://medium.com/code-life/how-to-benchmark-react-components-the-quick-and-dirty-guide-f595baf1014c)
  - ["Performance Engineering with React"](http://benchling.engineering/performance-engineering-with-react/)
- - ["A Deep Dive into React Perf Debugging"](http://benchling.engineering/deep-dive-react-perf-debugging/)
+ - ["A Deep Dive into React Perf Debugging"](http://benchling.engineering/deep-dive-react-perf-debugging/) 
 
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