Load the measured profile — once; concurrent calls share the same promise.
A FAILED load (offline, a chunk missing from the deploy) releases the cached
promise so the next selection retries: caching the rejection would make the
measured profile permanently unusable until a page reload.
Load the measured profile — once; concurrent calls share the same promise. A FAILED load (offline, a chunk missing from the deploy) releases the cached promise so the next selection retries: caching the rejection would make the measured profile permanently unusable until a page reload.