Just watched a Uzbek cutting green onions for Uzbek Palov. What made it interesting is he had a knife that was at least 3 feet long, razor sharp and the green onions he was cutting was in a bundle perhaps 28" in diameter. The knife just plained thin slices off of the end of this bundle. I have a lifelong love of what the little boy in me has always called "Chinese Noodles". My Dad was US Navy so we were interesting parts of the world all in the far east. I always ordered Chinese Noodles. Today when I make them for myself chopping the green onions has evolved into a meditative thing. I don't chop in mass but carefully cut each slice of the green onion. I now use a Wüsthof 3.1" paring knife, or a JCK 130mm petty knife. There is something very relaxing about cutting each slice of the green onion. I use 3 sticks of green onion so it doesn't take that long but you go into a Zen zone while doing it. Of course if need anything more it is out with a Nikari or a Gyuto and go to town.