"de305d54-75b4-431b-adb2-eb6b9e546014" is simply an encoding of a 128 bit number. This standard hex UUID representation requires 8 bits/character * 36 character

"de305d54-75b4-431b-adb2-eb6b9e546014" is simply an encoding of a 128 bit number. This standard hex UUID representation requires 8 bits/character * 36 characters == 288 bytes == 2304 bits. This encoding only requires 22 characters or 1408 bytes, almost half the size.