The last time I flew on a SQ A380 from SIN, the line for security was massive, snaking down the corridor, with no priority lane for business class. That security checkpoint served multiple A380 gates. Next month I will be on another SQ A380 flight leaving from terminal 3 (SQ638 for NRT) which departs at 23:55. I will be in J (not that that makes any difference anymore ). What can I expect in terms of security lines? Do I need to leave the lounge early to account for a long wait at security? Thanks in advance!