How much network overhead does TLS add compared to a non-encrypted connection?

Question

(Approximately) how many more bits of data must be transferred over the network during an encrypted connection compared to an unencrypted connection?

IIUC, once the TLS

Answer 1

An order of magnitude. See this. This is not too significant, if the information that is protected is worth securing. And remember that processor speeds can only go up, so performance will keep getting better.