React context api without unwanted re-renders

Even if/when we don’t use directly a context in our projects, most of the popular libraries like Formik, Redux, etc do; and if the used libraries don’t have a solution to bypass the unwanted re-renders issue, we should deal with it ourselves in our components.

I faced a big performance issue lastly due to those re-renders and to fix that, I had to use abusively React.memo, React.useCallback and React.useMemo in a lot of files. …