Use PureComponents or memo for react-router-dom

[theboolean]

Version

5.1.2

This is a feature request.

This issue is a copycat of #6434, since it was closed because the ecosystem was not ready to lose support for legacy context API. More than 1 year passed since then, and IMHO since v6 is out in alpha and it already contains breaking changes, we can go one step further and take the decision of optimizing react-router-dom components for the final v6, mentioning in the migration guide to upgrade to new context API.

In my case for example I have a list component that receives an array of items and I can't avoid that when one single item changes, all the Links in other items re-renders, creating a big performance hit in the application.

[timdorr]

Seems like an easy enough fix. Want to make a PR?

[theboolean]

@timdorr here you are! #7258