Resources that are retrieved from relevant application caches or local resources are included as PerformanceResourceTiming objects in the Performance Timeline.
Not sure what "local resources" are, but these days no resources are retrieved from relevant application caches.
https://w3c.github.io/resource-timing/#resources-included-in-the-performanceresourcetiming-interface
Not sure what "local resources" are, but these days no resources are retrieved from relevant application caches.