Was also on another SQ719 a couple of days ago. Minor turbulence all the way down to Singapore although luckily the captain kept the seat belt sign off throughout the felt. Could see the cabin crew was rushing though. Was asked if they could remove my tray and left me with just the dessert bowl once I was done with the main course. The entire meal service took only 30-40 minutes after take off to complete, J was around 70% full. After which, two of the crews disappeared to help out in Y.