Mostly just practice and experience. It's faster when you know where everything is and you don't have to ask other partners for help.

I find it useful to break them into chunks and that way you’re prepared all the time. As in don’t wait till you’re down to your last whip and make like 8-9 for the next day. If your canisters are washed and chilled, make 3-4. Then make more later. Sweet cream by nature is fast and easy anyhow. If in a bind, you can make a small one for a drink - in a tall ice cup, 4 pumps of vanilla, HC to first line, 2% to second line (notice that HC and 2% are in reverse in comparison to the other 2 recipes)