How efficient to frequently use chrome.storage.sync.get for the same key?

[Sergii Boiko]

In my extension, I need to do quite a frequent check for the same key in chrome.storage.sync.

Does Chrome pre-cache the same key or maybe even the whole dictionary for the extension? Or is it better to have some local cache?

I didn't find any limits on sync.get in https://developer.chrome.com/extensions/storage, but maybe there is some information about the efficiency of sync.get?