This misleading part of the article has been updated for more clarity. The concept of non-optimization is describbed in my previous article: https://community.

This misleading part of the article has been updated for more clarity. The concept of non-optimization is describbed in my previous article: https://community.risingstack.com/how-to-find-node-js-performance-optimization-killers/ https://community.risingstack.com/how-to-find-node-js-perfor... tl;dr: you want to avoid patterns that prevent optimization: the ones with a red "no" in the table.