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TWiW|3.5.20 #110

This week we take a look at fixing slow renders in your React JS app, a post mortem for the library is-promise and more.

 

Enjoy 🎉

is-promise post mortem
JavaScript

is-promise post mortem

By Forbes Lindesay
Forbes Lindesay outlines what happened when he released an update to the library is-promise, which caused about three hours of downtime for anyone attempting to use the package during the incident. He also discusses steps he has made to make the process as robust as possible in an attempt to avoid this situation in the future.
useWorker()
JavaScript

useWorker()

By Alessio Koci
This React Hook allows you to easily send tasks off the main thread, it uses the Web Workers API and supports Promises.
Fix the slow render before you fix the re-render
JavaScript

Fix the slow render before you fix the re-render

By Kent C. Dodds
Performance is a serious issue, Kent C. Dodds discusses how common it is to get fixated on fixing unnecessary re-renders and fail to address slow renders which arguably have a higher cost.
Jason Miller on Compiling Your Dependencies
Podcast

Jason Miller on compiling your dependencies

By babeljs.io
Jason Miller and Henry Zhu do a follow up episode on the issues around running modern JavaScript for not just your own code, but rather your dependencies (what's in node_modules).
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