I am aware that this question was already posted before, but since it was asked more than eight years ago I was wondering if there is solution now. The suggested answers in that post do not provide a satisfactory solution to the problem: Load attributes of an object without loading the file into memory.
Basically, it would be great to load object's attributes without having to load the file. In case user-written attributes can't be loaded, it would be great to at least be able to load basic attributes such as length or names. The fst::metadata_fst() does something similar, but the problem is that it only saves data.frames, so it does not work with other type of objects like lists.
Thanks.