This is a huge update! At least, for me, I can see several things on my code base that could be changed because of this. (The first one is the lazy initializati

This is a huge update! At least, for me, I can see several things on my code base that could be changed because of this. (The first one is the lazy initialization of sync primitives; and the second one is BorrowedFd/OwnedFd.