In this episode of the backend engineering show I go through an article I wrote discussing NodeJS Asynchronous I/O

https://medium.com/@hnasr/when-nodejs-i-o-blocks-327f8a36fbd4

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0:00

3:00 Part 1 Socket/IO

9:48 Part 2 File I/O

12:42 Part 3 DNS

16:22 Part 4 NodeJS Single Threaded

19:10 Part 5 NodeJS Thread Pool

21:23 Part 6 DNS lookup bottleneck in Node