To generalize. If a change occurred at a [hot] path of a [deeply nested] map, then only [React] components that depend on the data at any subpath would perform

To generalize. If a change occurred at a [hot] path of a [deeply nested] map, then only [React] components that depend on the data at any subpath would perform the dirty check (i.e. executing shouldComponentUpdate) to re-render the component.